mirrors/garage
1
0
Fork 0
mirror of https://git.deuxfleurs.fr/Deuxfleurs/garage.git synced 2024-12-22 23:26:35 +00:00
Code Issues Projects Releases Packages Wiki Activity

Merge pull request 'created doc/talks subfolder and added my talk and the previous one done at the wide team' (#67) from talks into main

Browse source 
Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/67
This commit is contained in:
Alex 2021-04-30 15:47:11 +02:00
commit b1f60579a1
46 changed files with 2135 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
doc/book/src/intro.md
View file

@ -89,7 +89,9 @@ If you encounter a specific bug in Garage or plan to patch it, you may jump dire
We love to talk and hear about Garage, that's why we keep a log here:
- [(fr, 2020-12-02) Garage : jouer dans la cour des grands quand on est un hébergeur associatif](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/main/doc/20201202_talk/talk.pdf)
- [(en, 2021-04-28) Distributed object storage is centralised](https://git.deuxfleurs.fr/Deuxfleurs/garage/raw/branch/talks/doc/main/2021-04-28_spirals-team/talk.pdf)
- [(fr, 2020-12-02) Garage : jouer dans la cour des grands quand on est un hébergeur associatif](https://git.deuxfleurs.fr/Deuxfleurs/garage/raw/branch/main/doc/talks/2020-12-02_wide-team/talk.pdf)
*Did you write or talk about Garage? [Open a pull request](https://git.deuxfleurs.fr/Deuxfleurs/garage/) to add a link here!*

0
doc/20201202_talk/.gitignore → doc/talks/2020-12-02_wide-team/.gitignore vendored
View file

0
doc/20201202_talk/Makefile → doc/talks/2020-12-02_wide-team/Makefile
View file

0
doc/20201202_talk/img/Amazon-S3.jpg → doc/talks/2020-12-02_wide-team/img/Amazon-S3.jpg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 44 KiB

After

Width:  |  Height:  |  Size: 44 KiB

0
doc/20201202_talk/img/cloud.png → doc/talks/2020-12-02_wide-team/img/cloud.png
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 19 KiB

After

Width:  |  Height:  |  Size: 19 KiB

0
doc/20201202_talk/img/consistent_hashing_1.svg → doc/talks/2020-12-02_wide-team/img/consistent_hashing_1.svg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 53 KiB

After

Width:  |  Height:  |  Size: 53 KiB

0
doc/20201202_talk/img/consistent_hashing_2.svg → doc/talks/2020-12-02_wide-team/img/consistent_hashing_2.svg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 54 KiB

After

Width:  |  Height:  |  Size: 54 KiB

0
doc/20201202_talk/img/consistent_hashing_3.svg → doc/talks/2020-12-02_wide-team/img/consistent_hashing_3.svg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 56 KiB

After

Width:  |  Height:  |  Size: 56 KiB

0
doc/20201202_talk/img/consistent_hashing_4.svg → doc/talks/2020-12-02_wide-team/img/consistent_hashing_4.svg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 57 KiB

After

Width:  |  Height:  |  Size: 57 KiB

0
doc/20201202_talk/img/dc.jpg → doc/talks/2020-12-02_wide-team/img/dc.jpg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 360 KiB

After

Width:  |  Height:  |  Size: 360 KiB

0
doc/20201202_talk/img/death.jpg → doc/talks/2020-12-02_wide-team/img/death.jpg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 39 KiB

After

Width:  |  Height:  |  Size: 39 KiB

0
doc/20201202_talk/img/garage_distributed.svg → doc/talks/2020-12-02_wide-team/img/garage_distributed.svg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 19 KiB

After

Width:  |  Height:  |  Size: 19 KiB

0
doc/20201202_talk/img/garage_tables.svg → doc/talks/2020-12-02_wide-team/img/garage_tables.svg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 27 KiB

After

Width:  |  Height:  |  Size: 27 KiB

0
doc/20201202_talk/img/rustacean-flat-happy.png → doc/talks/2020-12-02_wide-team/img/rustacean-flat-happy.png
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 32 KiB

After

Width:  |  Height:  |  Size: 32 KiB

0
doc/20201202_talk/img/shh.jpg → doc/talks/2020-12-02_wide-team/img/shh.jpg
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 86 KiB

After

Width:  |  Height:  |  Size: 86 KiB

0
doc/20201202_talk/img/sync.png → doc/talks/2020-12-02_wide-team/img/sync.png
View file

Side by side Swipe Overlay

Before

Width:  |  Height:  |  Size: 6.1 KiB

After

Width:  |  Height:  |  Size: 6.1 KiB

0
doc/20201202_talk/talk.pdf → doc/talks/2020-12-02_wide-team/talk.pdf
View file

0
doc/20201202_talk/talk.tex → doc/talks/2020-12-02_wide-team/talk.tex
View file

10
doc/talks/2021-04-28_spirals-team/.gitignore vendored Normal file
View file

@ -0,0 +1,10 @@
*.bbl
*.aux
*.bcf
*.blg
*.log
*.run.xml
*.synctex.gz
build/
main.pdf
figures/crdt.pdf

33
doc/talks/2021-04-28_spirals-team/Makefile Normal file
View file

@ -0,0 +1,33 @@
.PHONY: all viewpdf pdf clean
TARGET = main
SOURCE_FILES = $(shell find . -type f -name "*.tex" -print)
CLASS_FILES = $(shell find . -type f -name "*.cls" -print)
BIB_FILES = $(shell find . -type f -name "*.bib" -print)
FIGURES = $(shell find . -path "./figures/*" -type f -print)
BUILD_PATH = build
BUILD_FILES = $(shell find $(BUILD_PATH) -type f -print)
BIB_PROCESSOR := biber
.PHONY: all pdf clean figures
all: pdf
pdf: $(TARGET).pdf
clean:
@rm $(TARGET).pdf $(BUILD_FILES) > /dev/null 2>&1 || exit 0
figures: figures/crdt.pdf
$(TARGET).pdf: figures $(FIGURES) $(SOURCE_FILES) $(BIB_FILES) $(CLASS_FILES)
@mkdir -p $(BUILD_PATH) > /dev/null 2>&1 || exit 0
@pdflatex -interaction=nonstopmode -jobname=$(TARGET) -output-directory $(BUILD_PATH) $(TARGET).tex
@$(BIB_PROCESSOR) --output-directory $(BUILD_PATH) $(TARGET)
@pdflatex -interaction=nonstopmode -jobname=$(TARGET) -output-directory $(BUILD_PATH) $(TARGET).tex # For biber
@pdflatex -interaction=nonstopmode -jobname=$(TARGET) -output-directory $(BUILD_PATH) $(TARGET).tex # For biber
@ln -fs $(BUILD_PATH)/$(TARGET).pdf $(TARGET).pdf
figures/crdt.pdf: figures/svg/crdt.svg
@inkscape -C --file=$< --export-pdf=$@

1
doc/talks/2021-04-28_spirals-team/README.md Normal file
View file

@ -0,0 +1 @@
Presentation of Garage by Adrien on April, 28th 2021, for his research team [Spirals](https://team.inria.fr/spirals/).

27
doc/talks/2021-04-28_spirals-team/bibliography.bib Normal file
View file

@ -0,0 +1,27 @@
@inproceedings{brewer_towards_2000,
title = {Towards {{Robust Distributed Systems}}},
booktitle = {{{ACM PODC}}},
author = {Brewer, Eric},
year = {2000}
}
@incollection{defago_conflict-free_2011,
title = {Conflict-{{Free Replicated Data Types}}},
booktitle = {Stabilization, {{Safety}}, and {{Security}} of {{Distributed Systems}}},
author = {Shapiro, Marc and Pregui{\c c}a, Nuno and Baquero, Carlos and Zawirski, Marek},
year = {2011},
address = {{Berlin, Heidelberg}},
}
@inproceedings{decandia_dynamo:_2007,
title = {Dynamo: {{Amazon}}'s {{Highly Available Key}}-Value {{Store}}},
booktitle = {{ACM SOSP}},
author = {DeCandia, Giuseppe and Hastorun, Deniz and Jampani, Madan and Kakulapati, Gunavardhan and Lakshman, Avinash and Pilchin, Alex and Sivasubramanian, Swaminathan and Vosshall, Peter and Vogels, Werner},
year = {2007},
address = {{New York, USA}},
}

7
doc/talks/2021-04-28_spirals-team/conclusion.tex Normal file
View file

@ -0,0 +1,7 @@
\section{Conclusion}
\begin{frame}{The future is cooler when we bend it our way}
Contributions welcome! :D
\end{frame}

124
doc/talks/2021-04-28_spirals-team/escaping_the_cloud.tex Normal file
View file

@ -0,0 +1,124 @@
\section{Escaping the cloud}
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \begin{frame}{Down to Earth with home-hosting}
% \todo{Stanley Parabole reference?}
% \end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Why?}
\begin{itemize}
\item \textbf{Privacy}: no prying eyes besides your ISP
\item \textbf{Control} of your infrastructure
\item \textbf{Ecology}: reuse old hardware
\end{itemize}
\vfill
\begin{block}{\emph{Tim Berners-Lee} (1994)}
``Now, if someone tries to monopolize the Web, for example pushes proprietary variations on network protocols, then that would make me unhappy.''
\end{block}
\begin{itemize}
\item Make Tim Berners-Lee happy
\end{itemize}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{What?}
\centering\Large
A data store for commodity hardware on heterogenous household connections.
\vfill\raggedright\normalsize
\begin{block}{Targetting user-facing services}
\begin{itemize}
\item Static sites
\item E-mails
\item Instant communication
%\item Video streaming % No need for a data store
\item Collaboration
\end{itemize}
\end{block}
\vfill
Nothing fancy like sensors data streams, AI or IoT.
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{What?}
\begin{block}{Requirements}
\begin{itemize}
\item \textbf{No single point of failure} / flat hierarchy:
Any node can die for extended periods of time.
\item \textbf{Multi-site}: cluster spans regions/countries.
\item \textbf{Acceptable performance}.
\item \textbf{Lightweight}: targets legacy hardware.
\item \textbf{Conceptually simple}: built for low-tech organisations.
Adding/maintaining cluster nodes should be easy.
\end{itemize}
\end{block}
\vfill
\begin{block}{Non-goals}
\begin{itemize}
\item \textbf{Super badass performance}.
\item \textbf{NAT traversal} etc.: we require full-mesh connectivity.
\end{itemize}
\end{block}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{How?}
\begin{itemize}
\item Theoretically possible with object storage \& CRDTs.
\vfill
\item Household uplinks are getting decent (optical fibers).
\end{itemize}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Research Questions}
\begin{itemize}
\item Decent performance despite bad inter-node connectivity.
\vfill
\item Tailoring workloads as a function of nodes' capabilities:
\begin{itemize}
\item Make use of low-end nodes (e.g. Raspberry Pis),
\item Avoid impeding global performance because of low-end nodes.
\end{itemize}
\vfill
\item Building CRDTs for target use-cases:
\begin{itemize}
\item Software engineering: DSL or native code?
\item Provide APIs to data store users? Risky?
\end{itemize}
\vfill
\item Cluster management: effortless UX, low perf. overhead.
\end{itemize}
\end{frame}

BIN
doc/talks/2021-04-28_spirals-team/figures/c1.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/c2.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/c3.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/c4.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/conflict_acid.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/conflict_base.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/conflict_crdt.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/conflict_problem.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/dag_crdt.png Normal file
View file

Binary file not shown.
Side by side

After

Width:  |  Height:  |  Size: 147 KiB

BIN
doc/talks/2021-04-28_spirals-team/figures/garage_distributed.png Normal file
View file

Binary file not shown.
Side by side

After

Width:  |  Height:  |  Size: 34 KiB

BIN
doc/talks/2021-04-28_spirals-team/figures/garage_tables.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/m_proxy_gray.pdf Normal file
View file

Binary file not shown.

BIN
doc/talks/2021-04-28_spirals-team/figures/minio_edge.png Normal file
View file

Binary file not shown.
Side by side

After

Width:  |  Height:  |  Size: 104 KiB

BIN
doc/talks/2021-04-28_spirals-team/figures/rustacean-flat-happy.png Normal file
View file

Binary file not shown.
Side by side

After

Width:  |  Height:  |  Size: 32 KiB

930
doc/talks/2021-04-28_spirals-team/figures/svg/conflict.svg Normal file
View file

@ -0,0 +1,930 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
width="119.30722mm"
height="121.49291mm"
viewBox="0 0 119.30722 121.49291"
version="1.1"
id="svg8"
inkscape:version="0.92.5 (2060ec1f9f, 2020-04-08)"
sodipodi:docname="conflict.svg">
<defs
id="defs2">
<marker
inkscape:stockid="Arrow1Mend"
orient="auto"
refY="0"
refX="0"
id="marker2999"
style="overflow:visible"
inkscape:isstock="true">
<path
inkscape:connector-curvature="0"
id="path2997"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(-0.4,0,0,-0.4,-4,0)" />
</marker>
<marker
inkscape:stockid="Arrow1Mend"
orient="auto"
refY="0"
refX="0"
id="marker2964"
style="overflow:visible"
inkscape:isstock="true">
<path
inkscape:connector-curvature="0"
id="path2962"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(-0.4,0,0,-0.4,-4,0)" />
</marker>
<marker
inkscape:stockid="Arrow1Mend"
orient="auto"
refY="0"
refX="0"
id="marker1467"
style="overflow:visible"
inkscape:isstock="true">
<path
inkscape:connector-curvature="0"
id="path1465"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(-0.4,0,0,-0.4,-4,0)" />
</marker>
<marker
inkscape:isstock="true"
style="overflow:visible"
id="marker1449"
refX="0"
refY="0"
orient="auto"
inkscape:stockid="Arrow1Mend">
<path
inkscape:connector-curvature="0"
transform="matrix(-0.4,0,0,-0.4,-4,0)"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
id="path1447" />
</marker>
<marker
inkscape:isstock="true"
style="overflow:visible"
id="marker12071"
refX="0"
refY="0"
orient="auto"
inkscape:stockid="Arrow1Mend"
inkscape:collect="always">
<path
transform="matrix(-0.4,0,0,-0.4,-4,0)"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
id="path12069"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:isstock="true"
style="overflow:visible"
id="marker9668"
refX="0"
refY="0"
orient="auto"
inkscape:stockid="Arrow1Mend"
inkscape:collect="always">
<path
transform="matrix(-0.4,0,0,-0.4,-4,0)"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
id="path9666"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow1Mend"
orient="auto"
refY="0"
refX="0"
id="marker6943"
style="overflow:visible"
inkscape:isstock="true">
<path
id="path6941"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(-0.4,0,0,-0.4,-4,0)"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:isstock="true"
style="overflow:visible"
id="marker5445"
refX="0"
refY="0"
orient="auto"
inkscape:stockid="Arrow1Mend">
<path
transform="matrix(-0.4,0,0,-0.4,-4,0)"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
id="path5443"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow1Mend"
orient="auto"
refY="0"
refX="0"
id="marker1115"
style="overflow:visible"
inkscape:isstock="true"
inkscape:collect="always">
<path
id="path861"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(-0.4,0,0,-0.4,-4,0)"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow1Mend"
orient="auto"
refY="0"
refX="0"
id="Arrow1Mend"
style="overflow:visible"
inkscape:isstock="true">
<path
id="path826"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(-0.4,0,0,-0.4,-4,0)"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow1Lend"
orient="auto"
refY="0"
refX="0"
id="Arrow1Lend"
style="overflow:visible"
inkscape:isstock="true">
<path
id="path820"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(-0.8,0,0,-0.8,-10,0)"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow1Lstart"
orient="auto"
refY="0"
refX="0"
id="marker1101"
style="overflow:visible"
inkscape:isstock="true">
<path
id="path1099"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(0.8,0,0,0.8,10,0)"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow1Lstart"
orient="auto"
refY="0"
refX="0"
id="Arrow1Lstart"
style="overflow:visible"
inkscape:isstock="true">
<path
id="path817"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(0.8,0,0,0.8,10,0)"
inkscape:connector-curvature="0" />
</marker>
</defs>
<sodipodi:namedview
id="base"
pagecolor="#ffffff"
bordercolor="#666666"
borderopacity="1.0"
inkscape:pageopacity="0.0"
inkscape:pageshadow="2"
inkscape:zoom="1.4"
inkscape:cx="244.86596"
inkscape:cy="205.06317"
inkscape:document-units="mm"
inkscape:current-layer="layer5"
showgrid="false"
inkscape:window-width="1920"
inkscape:window-height="1055"
inkscape:window-x="0"
inkscape:window-y="0"
inkscape:window-maximized="1"
fit-margin-top="0"
fit-margin-left="0"
fit-margin-right="0"
fit-margin-bottom="0"
inkscape:snap-global="false" />
<metadata
id="metadata5">
<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
<dc:title></dc:title>
</cc:Work>
</rdf:RDF>
</metadata>
<g
inkscape:groupmode="layer"
id="layer2"
inkscape:label="Common"
transform="translate(-43.663712,-16.067619)"
style="display:inline">
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.5291667;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
d="m 99.856918,34.684511 h 4.913692"
id="path1257"
inkscape:connector-curvature="0" />
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.79374999;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#Arrow1Mend)"
d="M 102.31376,23.208557 V 135.9963"
id="path815"
inkscape:connector-curvature="0" />
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="90.524658"
y="19.57423"
id="text838"><tspan
sodipodi:role="line"
id="tspan836"
x="90.524658"
y="19.57423"
style="font-weight:bold;stroke-width:0.26458332px"># vaccines</tspan></text>
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="46.748138"
y="19.57423"
id="text13775"><tspan
sodipodi:role="line"
id="tspan13773"
x="46.748138"
y="19.57423"
style="font-style:italic;font-variant:normal;font-weight:normal;font-stretch:normal;font-family:Iwona;-inkscape-font-specification:'Iwona Italic';stroke-width:0.26458332px">Paris</tspan></text>
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="148.20457"
y="19.57423"
id="text13798"><tspan
sodipodi:role="line"
id="tspan13796"
x="148.20457"
y="19.57423"
style="font-style:italic;font-variant:normal;font-weight:normal;font-stretch:normal;font-family:Iwona;-inkscape-font-specification:'Iwona Italic';stroke-width:0.26458332px">Lille</tspan></text>
</g>
<g
inkscape:label="The problem"
inkscape:groupmode="layer"
id="layer1"
style="display:none"
transform="translate(-43.663712,-16.067619)">
<g
id="g13753"
transform="translate(0,12.170833)">
<path
inkscape:connector-curvature="0"
id="path850"
d="M 97.820644,51.619712 75.828475,64.316897"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker1115)" />
<text
y="-108.69946"
x="-183.00148"
transform="rotate(180,91.874093,54.229103)"
id="text7803"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><textPath
id="textPath7973"
xlink:href="#path850"><tspan
id="tspan7801"
style="font-weight:bold;stroke-width:0.26458332px">R</tspan></textPath></text>
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker9668)"
d="M 75.056888,72.78638 97.049057,85.483565"
id="path9498"
inkscape:connector-curvature="0" />
<text
transform="translate(9.4212508,3.3408691)"
y="2.986012"
x="8.5186663"
id="text10668"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><textPath
id="textPath10836"
xlink:href="#path9498"><tspan
id="tspan10666"
style="font-weight:bold;stroke-width:0.26458332px">W</tspan></textPath></text>
</g>
<g
id="g13763"
transform="translate(0,12.170833)">
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker12071)"
d="m 106.80689,51.619712 21.99218,12.697185"
id="path11899"
inkscape:connector-curvature="0" />
<path
inkscape:connector-curvature="0"
id="path11901"
d="M 129.57066,72.78638 107.57848,85.483565"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker9668)" />
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
id="text13737"
transform="rotate(-115.89278,108.31787,47.643413)"
x="-372.04132"
y="-217.15767"><textPath
xlink:href="#path850"
id="textPath13735"><tspan
style="font-weight:bold;stroke-width:0.26458332px"
id="tspan13733">R</tspan></textPath></text>
<text
transform="rotate(-58.856754,100.88692,38.870944)"
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
id="text13743"
x="46.604572"
y="6.6609678"><textPath
xlink:href="#path9498"
id="textPath13741"><tspan
style="font-weight:bold;stroke-width:0.26458332px"
id="tspan13739">W</tspan></textPath></text>
</g>
<path
inkscape:connector-curvature="0"
id="path13768"
d="m 99.856918,112.89149 h 4.913692"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.5291667;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="43.564934"
y="53.51746"
id="text13802"><tspan
sodipodi:role="line"
id="tspan13800"
x="43.564934"
y="53.51746"
style="stroke-width:0.26458332px">We acquired 1000 doses!</tspan></text>
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="49.979401"
y="82.649841"
id="text13806"><tspan
sodipodi:role="line"
id="tspan13804"
x="49.979401"
y="82.649841"
style="stroke-width:0.26458332px">x + 1000</tspan></text>
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="136.842"
y="82.649841"
id="text13810"><tspan
sodipodi:role="line"
id="tspan13808"
x="136.842"
y="82.649841"
style="stroke-width:0.26458332px">x + 500</tspan></text>
<text
id="text13814"
y="53.51746"
x="112.88577"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="stroke-width:0.26458332px"
y="53.51746"
x="112.88577"
id="tspan13812"
sodipodi:role="line">We acquired 500 doses!</tspan></text>
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="108.70142"
y="114.62009"
id="text13818"><tspan
sodipodi:role="line"
id="tspan13816"
x="108.70142"
y="114.62009"
style="font-weight:bold;stroke-width:0.26458332px">???</tspan></text>
<text
id="text3109"
y="36.388439"
x="108.80019"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333311px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px"
y="36.388439"
x="108.80019"
id="tspan3107"
sodipodi:role="line">T0: 5000</tspan></text>
</g>
<g
inkscape:groupmode="layer"
id="layer3"
inkscape:label="ACID"
style="display:none">
<rect
ry="5.2916665"
y="67.923912"
x="61.174206"
height="39.498508"
width="54.42857"
id="rect14092"
style="opacity:1;vector-effect:none;fill:#f9f9f9;fill-opacity:0.97409327;fill-rule:nonzero;stroke:#000000;stroke-width:0.26458332;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:0.91191711;paint-order:fill markers stroke" />
<rect
style="opacity:1;vector-effect:none;fill:#f9f9f9;fill-opacity:0.97409327;fill-rule:nonzero;stroke:#000000;stroke-width:0.26458332;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:0.91191711;paint-order:fill markers stroke"
id="rect14090"
width="54.42857"
height="39.498508"
x="1.6973262"
y="21.886396"
ry="5.2916665" />
<path
inkscape:connector-curvature="0"
id="path14037"
d="m 56.193207,64.654408 h 4.913692"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.5291667;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.5291667;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
d="m 56.193207,110.69192 h 4.913692"
id="path14040"
inkscape:connector-curvature="0" />
<g
id="g14075"
transform="translate(0,-1.9988201)">
<g
id="g13993"
transform="translate(-43.663711,-25.06345)"
style="display:inline">
<path
inkscape:connector-curvature="0"
id="path13977"
d="M 97.820644,51.619712 75.828475,64.316897"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker1115)" />
<text
y="-108.69946"
x="-183.00148"
transform="rotate(180,91.874093,54.229103)"
id="text13983"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><textPath
id="textPath13981"
xlink:href="#path850"><tspan
id="tspan13979"
style="font-weight:bold;stroke-width:0.26458332px">R</tspan></textPath></text>
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker9668)"
d="M 75.056888,72.78638 97.049057,85.483565"
id="path13985"
inkscape:connector-curvature="0" />
<text
transform="translate(9.4212508,3.3408691)"
y="2.986012"
x="8.5186663"
id="text13991"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><textPath
id="textPath13989"
xlink:href="#path9498"><tspan
id="tspan13987"
style="font-weight:bold;stroke-width:0.26458332px">W</tspan></textPath></text>
</g>
<text
id="text14044"
y="29.833508"
x="3.4844763"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="stroke-width:0.26458332px"
y="29.833508"
x="3.4844763"
id="tspan14042"
sodipodi:role="line">AcqDoses(1000)</tspan></text>
</g>
<g
id="g14088"
transform="translate(0,-0.41130478)">
<g
id="g14011"
transform="translate(-43.663711,19.386549)"
style="display:inline">
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker12071)"
d="m 106.80689,51.619712 21.99218,12.697185"
id="path13995"
inkscape:connector-curvature="0" />
<path
inkscape:connector-curvature="0"
id="path13997"
d="M 129.57066,72.78638 107.57848,85.483565"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker9668)" />
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
id="text14003"
transform="rotate(-115.89278,108.31787,47.643413)"
x="-372.04132"
y="-217.15767"><textPath
xlink:href="#path850"
id="textPath14001"><tspan
style="font-weight:bold;stroke-width:0.26458332px"
id="tspan13999">R</tspan></textPath></text>
<text
transform="rotate(-58.856754,100.88692,38.870944)"
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
id="text14009"
x="46.604572"
y="6.6609678"><textPath
xlink:href="#path9498"
id="textPath14007"><tspan
style="font-weight:bold;stroke-width:0.26458332px"
id="tspan14005">W</tspan></textPath></text>
</g>
<text
id="text14044-8"
y="74.283508"
x="82.76487"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="stroke-width:0.26458332px"
y="74.283508"
x="82.76487"
id="tspan14042-8"
sodipodi:role="line">AcqDoses(500)</tspan></text>
</g>
<text
transform="translate(-43.663711,-16.067619)"
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333311px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="108.80019"
y="82.757004"
id="text832-6"><tspan
sodipodi:role="line"
id="tspan830-8"
x="108.80019"
y="82.757004"
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px">T1: 6000</tspan></text>
<text
transform="translate(-43.663711,-16.067619)"
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333311px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="108.80019"
y="128.8701"
id="text832-3"><tspan
sodipodi:role="line"
id="tspan830-83"
x="108.80019"
y="128.8701"
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px">T2: 6500</tspan></text>
<text
transform="translate(-43.663711,-16.067619)"
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333311px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="108.80019"
y="36.388439"
id="text3117"><tspan
sodipodi:role="line"
id="tspan3115"
x="108.80019"
y="36.388439"
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px">T0: 5000</tspan></text>
</g>
<g
inkscape:groupmode="layer"
id="layer4"
inkscape:label="BASE"
style="display:none">
<g
id="g1463"
transform="translate(0,-21.166667)">
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker1449)"
d="M 54.156933,47.722926 32.164764,60.420111"
id="path1369"
inkscape:connector-curvature="0" />
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
id="text1375"
transform="rotate(180,70.308075,52.117558)"
x="-279.42224"
y="-209.36409"><textPath
xlink:href="#path850"
id="textPath1373"><tspan
style="font-weight:bold;stroke-width:0.26458332px"
id="tspan1371">R</tspan></textPath></text>
</g>
<g
id="g1481"
transform="translate(0,-21.166667)">
<path
inkscape:connector-curvature="0"
id="path1377"
d="M 31.393177,68.889594 53.385346,81.586779"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker1467)" />
<text
transform="translate(-34.395836)"
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
id="text1383"
x="17.939917"
y="6.3268809"><textPath
xlink:href="#path9498"
id="textPath1381"><tspan
style="font-weight:bold;stroke-width:0.26458332px"
id="tspan1379">W</tspan></textPath></text>
</g>
<g
style="display:inline"
transform="translate(-43.663711,-25.063453)"
id="g1403">
<path
inkscape:connector-curvature="0"
id="path1387"
d="m 106.80689,51.619712 21.99218,12.697185"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker12071)" />
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker9668)"
d="M 129.57066,72.78638 107.57848,85.483565"
id="path1389"
inkscape:connector-curvature="0" />
<text
y="-217.15767"
x="-372.04132"
transform="rotate(-115.89278,108.31787,47.643413)"
id="text1395"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><textPath
id="textPath1393"
xlink:href="#path850"><tspan
id="tspan1391"
style="font-weight:bold;stroke-width:0.26458332px">R</tspan></textPath></text>
<text
y="6.6609678"
x="46.604572"
id="text1401"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"
transform="rotate(-58.856754,100.88692,38.870944)"><textPath
id="textPath1399"
xlink:href="#path9498"><tspan
id="tspan1397"
style="font-weight:bold;stroke-width:0.26458332px">W</tspan></textPath></text>
</g>
<path
inkscape:connector-curvature="0"
id="path1503"
d="m 56.193207,73.650233 h 4.913692"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.5291667;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
<text
id="text1507"
y="75.354156"
x="64.607315"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333311px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px"
y="75.354156"
x="64.607315"
id="tspan1505"
sodipodi:role="line">T1: [(T0, 6000),(T0, 5500)]</tspan></text>
<g
id="g1530"
transform="translate(0,38.100002)">
<path
inkscape:connector-curvature="0"
id="path1522"
d="M 54.156933,47.722926 32.164764,60.420111"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker1449)" />
<text
y="-209.36409"
x="-279.42224"
transform="rotate(180,70.308075,52.117558)"
id="text1528"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><textPath
id="textPath1526"
xlink:href="#path850"><tspan
id="tspan1524"
style="font-weight:bold;stroke-width:0.26458332px">R</tspan></textPath></text>
</g>
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Bold';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="8.5044641"
y="109.58665"
id="text1534"><tspan
sodipodi:role="line"
id="tspan1532"
x="8.5044641"
y="109.58665"
style="font-weight:normal;stroke-width:0.26458332px">Now solve this!</tspan><tspan
sodipodi:role="line"
x="8.5044641"
y="115.76025"
style="font-weight:normal;stroke-width:0.26458332px"
id="tspan3159">And write back!</tspan></text>
<text
id="text1538"
y="44.886383"
x="6.3156896"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="stroke-width:0.26458332px"
y="44.886383"
x="6.3156896"
id="tspan1536"
sodipodi:role="line">x + 1000</tspan></text>
<text
id="text1542"
y="44.886383"
x="93.178284"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="stroke-width:0.26458332px"
y="44.886383"
x="93.178284"
id="tspan1540"
sodipodi:role="line">x + 500</tspan></text>
<text
transform="translate(-43.663711,-16.067619)"
id="text3103"
y="36.388439"
x="108.80019"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333311px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px"
y="36.388439"
x="108.80019"
id="tspan3101"
sodipodi:role="line">T0: (⊥, 5000)</tspan></text>
</g>
<g
inkscape:groupmode="layer"
id="layer5"
inkscape:label="CRDT"
style="display:inline">
<g
style="display:inline"
transform="translate(0,-21.166667)"
id="g2920">
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker1467)"
d="M 31.393177,68.889594 53.385346,81.586779"
id="path2912"
inkscape:connector-curvature="0" />
<text
y="6.3268809"
x="17.939917"
id="text2918"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"
transform="translate(-34.395836)"><textPath
id="textPath2916"
xlink:href="#path9498"><tspan
id="tspan2914"
style="font-weight:bold;stroke-width:0.26458332px">W</tspan></textPath></text>
</g>
<g
id="g3013">
<path
inkscape:connector-curvature="0"
id="path2924"
d="M 85.906949,47.722927 63.914769,60.420112"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker2999)" />
<text
transform="rotate(-58.856754,57.228059,65.935492)"
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
id="text2936"
x="7.1585193"
y="48.970455"><textPath
xlink:href="#path9498"
id="textPath2934"><tspan
style="font-weight:bold;stroke-width:0.26458332px"
id="tspan2932">W</tspan></textPath></text>
</g>
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Bold';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="15.648211"
y="44.007793"
id="text2976"><tspan
sodipodi:role="line"
id="tspan2974"
x="15.648211"
y="44.007793"
style="font-weight:normal;stroke-width:0.26458332px">incr(1000)</tspan></text>
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Bold';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
x="82.927979"
y="44.007793"
id="text2980"><tspan
sodipodi:role="line"
id="tspan2978"
x="82.927979"
y="44.007793"
style="font-weight:normal;stroke-width:0.26458332px">incr(500)</tspan></text>
<path
inkscape:connector-curvature="0"
id="path2982"
d="m 56.193207,72.591896 h 4.913692"
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.5291667;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
<text
id="text2986"
y="74.295815"
x="65.136482"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333311px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px"
y="74.295815"
x="65.136482"
sodipodi:role="line"
id="tspan2995">T1: (5000, </tspan><tspan
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px"
y="79.777985"
x="65.136482"
sodipodi:role="line"
id="tspan1204"> {(a, 1000), (b, 500)})</tspan></text>
<g
style="display:inline"
transform="translate(0,38.100003)"
id="g3042">
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.52969581;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker1449)"
d="M 54.156933,47.722926 32.164764,60.420111"
id="path3034"
inkscape:connector-curvature="0" />
<text
xml:space="preserve"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
id="text3040"
transform="rotate(180,70.308075,52.117558)"
x="-279.42224"
y="-209.36409"><textPath
xlink:href="#path850"
id="textPath3038"><tspan
style="font-weight:bold;stroke-width:0.26458332px"
id="tspan3036">R</tspan></textPath></text>
</g>
<text
id="text3051"
y="102.21611"
x="17.764879"
style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Bold';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;stroke-width:0.26458332px"
y="102.21611"
x="17.764879"
id="tspan3049"
sodipodi:role="line">6500</tspan></text>
<text
transform="translate(-43.663711,-16.067619)"
id="text3097"
y="36.388439"
x="108.80019"
style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333311px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;font-size:4.93888903px;stroke-width:0.26458332px"
y="36.388439"
x="108.80019"
id="tspan3095"
sodipodi:role="line">T0: (5000, ∅)</tspan></text>
</g>
</svg>
Side by side

After

Width:  |  Height:  |  Size: 52 KiB

227
doc/talks/2021-04-28_spirals-team/figures/svg/crdt.svg Normal file
View file

@ -0,0 +1,227 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
width="82.010674mm"
height="17.561125mm"
viewBox="0 0 82.010674 17.561125"
version="1.1"
id="svg1579"
inkscape:version="0.92.5 (2060ec1f9f, 2020-04-08)"
sodipodi:docname="crdt.svg">
<defs
id="defs1573">
<marker
inkscape:isstock="true"
style="overflow:visible"
id="marker2645"
refX="0"
refY="0"
orient="auto"
inkscape:stockid="Arrow2Mend">
<path
transform="scale(-0.6)"
d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
id="path2643"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:isstock="true"
style="overflow:visible"
id="marker2605"
refX="0"
refY="0"
orient="auto"
inkscape:stockid="Arrow2Mstart">
<path
transform="scale(0.6)"
d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
id="path2603"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow2Mend"
orient="auto"
refY="0"
refX="0"
id="Arrow2Mend"
style="overflow:visible"
inkscape:isstock="true"
inkscape:collect="always">
<path
id="path2206"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
transform="scale(-0.6)"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow2Mstart"
orient="auto"
refY="0"
refX="0"
id="Arrow2Mstart"
style="overflow:visible"
inkscape:isstock="true"
inkscape:collect="always">
<path
id="path2203"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
transform="scale(0.6)"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow2Lstart"
orient="auto"
refY="0"
refX="0"
id="Arrow2Lstart"
style="overflow:visible"
inkscape:isstock="true">
<path
id="path2197"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
transform="matrix(1.1,0,0,1.1,1.1,0)"
inkscape:connector-curvature="0" />
</marker>
<marker
inkscape:stockid="Arrow1Sstart"
orient="auto"
refY="0"
refX="0"
id="Arrow1Sstart"
style="overflow:visible"
inkscape:isstock="true">
<path
id="path2191"
d="M 0,0 5,-5 -12.5,0 5,5 Z"
style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1"
transform="matrix(0.2,0,0,0.2,1.2,0)"
inkscape:connector-curvature="0" />
</marker>
</defs>
<sodipodi:namedview
id="base"
pagecolor="#ffffff"
bordercolor="#666666"
borderopacity="1.0"
inkscape:pageopacity="0.0"
inkscape:pageshadow="2"
inkscape:zoom="2.8"
inkscape:cx="148.82928"
inkscape:cy="-32.722297"
inkscape:document-units="mm"
inkscape:current-layer="layer1"
showgrid="false"
inkscape:snap-bbox="true"
fit-margin-top="0"
fit-margin-left="0"
fit-margin-right="0"
fit-margin-bottom="0"
inkscape:window-width="1920"
inkscape:window-height="1055"
inkscape:window-x="0"
inkscape:window-y="0"
inkscape:window-maximized="1" />
<metadata
id="metadata1576">
<rdf:RDF>
<cc:Work
rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
<dc:title />
</cc:Work>
</rdf:RDF>
</metadata>
<g
inkscape:label="Layer 1"
inkscape:groupmode="layer"
id="layer1"
transform="translate(-21.438257,-19.857903)">
<path
style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.26458332;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-start:url(#Arrow2Mstart);marker-end:url(#Arrow2Mend)"
d="M 44.979166,28.87314 H 58.822544"
id="path2177"
inkscape:connector-curvature="0" />
<g
id="g2153">
<rect
rx="0"
ry="3.8793426"
y="19.990194"
x="21.570549"
height="17.296541"
width="23.537758"
id="rect2124"
style="opacity:1;vector-effect:none;fill:#f9f9f9;fill-opacity:0.97409327;fill-rule:nonzero;stroke:#000000;stroke-width:0.26458332;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:0.91191711;paint-order:fill markers stroke" />
<text
id="text2132"
y="29.799105"
x="29.366098"
style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Bold';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;stroke-width:0.26458332px"
y="29.799105"
x="29.366098"
id="tspan2130"
sodipodi:role="line">App</tspan></text>
</g>
<rect
rx="0"
ry="3.8793426"
y="19.990194"
x="58.612213"
height="17.296541"
width="23.537758"
id="rect2155"
style="opacity:1;vector-effect:none;fill:#f9f9f9;fill-opacity:0.97409327;fill-rule:nonzero;stroke:#000000;stroke-width:0.26458332;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:0.91191711;paint-order:fill markers stroke" />
<text
id="text2159"
y="30.367077"
x="63.842014"
style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Bold';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;stroke-width:0.26458332px"
y="30.367077"
x="63.842014"
id="tspan2157"
sodipodi:role="line">CRDT</tspan></text>
<g
id="g4137"
transform="translate(-15.875)">
<rect
rx="0"
ry="3.8793426"
y="19.990194"
x="95.653885"
height="17.296541"
width="23.537758"
id="rect2163"
style="opacity:1;vector-effect:none;fill:#f9f9f9;fill-opacity:0.97409327;fill-rule:nonzero;stroke:#000000;stroke-width:0.26458332;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:0.91191711;paint-order:fill markers stroke" />
<text
id="text2167"
y="30.367077"
x="96.969627"
style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:4.93888855px;line-height:125%;font-family:Iwona;-inkscape-font-specification:'Iwona, Bold';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
xml:space="preserve"><tspan
style="font-weight:normal;stroke-width:0.26458332px"
y="30.367077"
x="96.969627"
id="tspan2165"
sodipodi:role="line">Datastore</tspan></text>
</g>
</g>
</svg>
Side by side

After

Width:  |  Height:  |  Size: 9.4 KiB

147
doc/talks/2021-04-28_spirals-team/garage.tex Normal file
View file

@ -0,0 +1,147 @@
\section{Introducing Garage}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Brought to you by the Deuxfleurs association}
\begin{block}{\textbf{deuxfleurs.fr} -- a libre hosting association with a vision}
``Shifting the current structure of the Internet from a world of a few very large service providers, to a world where services are hosted by a variety of smaller organisations.''
\end{block}
\begin{block}{Our goals}
\begin{itemize}
\item To propose performant \& reliable libre services for the masses
\item To host and administer our infrastructure ourselves
\item To allow members to contribute storage/compute nodes
\item Resilience: for availability \& the sysadmins' sleep
\item Conceptual simplicity to ease onboarding \& demistify hosting
\end{itemize}
\end{block}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{The lacking state of the practice}
\begin{block}{Object storage fitted our needs}
\begin{itemize}
\item Distributed by design
\item Objects are replicated
\item Conceptually simple
\end{itemize}
\end{block}
\vfill
\begin{block}{Existing object stores did not}
\begin{itemize}
\item Too specific / complex
\item Resource hungry
\item Hidden constraints
\end{itemize}
\end{block}
\vfill
We developed Garage, an object store with minimal functionality.
It works, and serves our static sites and media.
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Introducing Garage}
\centering
\url{garagehq.deuxfleurs.fr}
\url{git.deuxfleurs.fr/Deuxfleurs/garage}
\includegraphics[width=.4\columnwidth]{figures/garage_distributed.png}
\vfill
\raggedright
\begin{itemize}
\item Distributed data store
\item Based on DynamoDB object store (P2P!)
\item Modular data types/protocols with CRDTs:
\begin{itemize}
\item Done: objects (media, static sites, backups...) via S3 API
\item To do: e-mails via IMAP protocol, and more
\end{itemize}
\end{itemize}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}[t]{The \textbf{RING}}
\centering
\fullcite{decandia_dynamo:_2007}
\vspace{3ex}
\only<1>{\includegraphics[width=.5\columnwidth]{figures/c1.pdf}}%
\only<2>{\includegraphics[width=.5\columnwidth]{figures/c2.pdf}}%
\only<3>{\includegraphics[width=.5\columnwidth]{figures/c3.pdf}}%
\only<4>{\includegraphics[width=.5\columnwidth]{figures/c4.pdf}}%
\vspace{5ex}
%\raggedright
\only<1>{Each node is assigned a unique ID on the circular address space.}%
\only<2-3>{When a new object is added to the store...}%
\only<3>{\\ It is assigned a unique ID (its \emph{key}) on the address space.}%
\only<4>{The $R$ nodes after the object are in charge of replicating it.}%
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Distributed metadata}
\centering
\includegraphics[width=.8\columnwidth]{figures/garage_tables.pdf}
\vfill
The objects, versions and blocks are all stored in the ring.
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Written in Rust}
\begin{columns}
\column{.65\columnwidth}
Entirely written in Rust!
\column{.35\columnwidth}
\centering
\includegraphics[width=.85\columnwidth]{figures/rustacean-flat-happy.png}
\end{columns}
\vfill
\begin{columns}
\column[t]{.6\columnwidth}
\textbf{Pros:}
\begin{itemize}
\item Compiled and fast
\item Features prevent usual mistakes:
strongly typed, immutable by default, ownership instead of GC...
\item Best of several paradigms:
imperative, OO, functional
\item Good libraries for network programmings:
serialization, http, async/await...
\end{itemize}
\column[t]{.4\columnwidth}
\textbf{Cons}:
\begin{itemize}
\item Steep learning curve
\item Long compilation times
\item Compiler rage
\end{itemize}
\end{columns}
\end{frame}

134
doc/talks/2021-04-28_spirals-team/header.tex Normal file
View file

@ -0,0 +1,134 @@
%% Imports %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{graphicx}
\usepackage[utf8]{inputenc}
\usepackage{csquotes} % Elegant quotes (must be loaded before babel)
\usepackage[english]{babel}
\usepackage[T1]{fontenc}
% \usepackage{amsfonts}
% \usepackage{amssymb}
%\usepackage{lmodern}
\usepackage{iwona}
\usepackage{color}
\usepackage{xspace}
\usepackage{amsmath}
\usepackage{hanging}
\usepackage{listings}
\lstset{basicstyle=\scriptsize}
\usepackage{tikz}
\usepackage{tikzsymbols} % For emojis
%\usepackage{setspace} % Activation disables footnoes
\usepackage{perpage} % Reset footnote counter every page
\MakePerPage{footnote}
\usepackage{nameref} % For printing the sections' name
\usepackage{hyperref}
%% Biblio %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[style=alphabetic,giveninits=true,sorting=none,hyperref,backend=biber,maxnames=3]{biblatex}
\addbibresource{bibliography.bib}
%% Templating %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{pgf}
\usepackage{xifthen, tikz}
\usetheme{default}
\makeatletter
%%% colors
\definecolor{bleuroi}{RGB}{0, 8, 88}
\definecolor{vertemeraude}{RGB}{0, 64, 44}
\definecolor{lightgray}{RGB}{245,245,245}
\definecolor{encre_de_chine}{RGB}{9,36,53}
\definecolor{im_lost_in_your_eyes}{RGB}{110,138,159}
\definecolor{metallic_grey}{RGB}{209,219,221}
\definecolor{metallic_white}{RGB}{229,239,241}
\definecolor{boss}{RGB}{229,72,27}
\definecolor{toon_eyes}{RGB}{3,4,6}
\setbeamercolor{frametitle}{bg=bleuroi,fg=white}
\setbeamercolor*{normal text}{fg=toon_eyes,bg=white}
\setbeamercolor*{block title}{fg=white,bg=vertemeraude}
\setbeamercolor*{block body}{fg=toon_eyes,bg=vertemeraude!5}
\setbeamercolor{alerted text}{fg=vertemeraude}
\setbeamercolor*{example text}{fg=toon_eyes,bg=white}
\setbeamercolor*{structure}{fg=bleuroi,bg=white}
% sectionnavigation:
\setbeamercolor*{section in head/foot}{fg=bleuroi,bg=white}
% \let\oldtextbf\textbf
% \renewcommand{\textbf}[1]{\textcolor{bleuroi}{\oldtextbf{#1}}}
%%% Rounded boxes with no shading
\pgfdeclareverticalshading[lower.bg,upper.bg]{bmb@transition}{200cm}{%
color(0pt)=(upper.bg); color(2pt)=(upper.bg); color(4pt)=(upper.bg)}
\setbeamertemplate{blocks}[rounded][shadow=false]
%%% Who on Earth uses navigation bars?
\setbeamertemplate{navigation symbols}{}
%%% Headline with sections
\setbeamertemplate{headline}
{%
\begin{beamercolorbox}[wd=\paperwidth,dp=.5ex,ht=2ex]{section in head/foot}
\insertsectionnavigationhorizontal{\paperwidth}{\hskip0pt plus1fill}{\hskip0pt plus1fill}\par % Centered
%\insertsectionnavigationhorizontal{\paperwidth}{}{\hfill\hfill} % Left aligned
\end{beamercolorbox}%
}
% Set the colors of the section bar
\usesectionheadtemplate
{\colorbox{fg}{\color{bg} \insertsectionhead}}
{\color{fg!40!bg} \insertsectionhead}
% \newlength\lpg@linewd
% \setbox0=\hbox{\strut}
% \newlength\strutht \strutht\ht0
% \newlength\strutdp \strutdp\dp0
\setbeamertemplate{frametitle}
{
\begin{beamercolorbox}[wd=\paperwidth,dp=1ex,ht=2.6ex,leftskip=.7cm,rightskip=.7cm]{frametitle}
%\vskip-1ex
%[wd=\lpg@linewd, ht=\strutht, dp=\strutdp]{frametitle}
%\vskip-.8ex\hskip0.7cm
%\vskip-.8ex
\usebeamerfont{frametitle}\strut\insertframetitle
\ifx\insertframesubtitle\@empty
\else
\hfill \usebeamerfont{framesubtitle}\strut\insertframesubtitle
\fi%
\end{beamercolorbox}
}
%%% Page numbering in footline
\setbeamertemplate{footline}{
\hbox{\begin{beamercolorbox}[wd=1\paperwidth,ht=2.5ex,dp=1ex,right]{framenumber in head/foot}%
\usebeamerfont{framenumber in head/foot}%
%\insertframenumber\space/\space\inserttotalframenumber\hspace{0.3em}
\insertframenumber\hspace{0.5em}
\end{beamercolorbox}}}
%%% Reduce foot citation size
\renewcommand{\footnotesize}{\tiny}
%%% Display footnotes (not working, still no footnotes)
% \setbeamertemplate{footnote}{%
% \hangpara{2em}{1}%
% \makebox[2em][l]{\insertfootnotemark}\footnotesize\insertfootnotetext\par%
% }
\makeatother
%% Commentaires %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcommand{\annote}[3]{{
\colorbox{#3}{\bfseries\sffamily\footnotesize\textcolor{white}{#2}}
\color{#3}
$\blacktriangleright$\textit{#1}$\blacktriangleleft$}
}
%% Uncomment for final version (removes notes)
%\renewcommand{\annote}[3]{}
\newcommand{\todo}[1]{\annote{#1}{TODO}{green}}

99
doc/talks/2021-04-28_spirals-team/introduction.tex Normal file
View file

@ -0,0 +1,99 @@
\section{Introduction}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{A very casual motivation}
\begin{center}
\Large
I want to host \textbf{resilient web services} with \textbf{acceptable performance} on commodity hardware behind \textbf{household networks}.
\end{center}
\vfill
\begin{block}{Keywords}
\begin{columns}
\column{.5\columnwidth}
\begin{itemize}
\item Decentralised networks
\item Edge computing
\end{itemize}
\column{.5\columnwidth}
\begin{itemize}
\item Distributed storage
\item Privacy
\end{itemize}
\end{columns}
\end{block}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Context}
\textbf{Resilience}: Ability to recover quickly from failures and changes.
\vspace{1ex}
Only achievable through distribution of the hosted applications across several physical locations.
\vfill
\begin{block}{Application = \textbf{computations} on \textbf{data}}
\begin{itemize}
\item \textbf{Computation}: Stateless; easy to distribute \& orchestrate.
% where it is performed does not matter as long as the application's state is accessible R/W
%Computation units are "easy" to distribute and orchestrate.
\item \textbf{Data}: Stateful; hard to distribute \& full of trade-offs.
\end{itemize}
\end{block}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Concurrent writes example}{How to lose vaccines}
\centering
\includegraphics[width=.5\columnwidth]{figures/conflict_problem.pdf}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{The problem}
% \textbf{Path dependency}: existing data stores are built for data centres.
% $\implies$ They assume good inter-node connectivity.
% \vfill
\begin{center}
\Large
Can we design an available data store tailored for adverse network conditions?
\end{center}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Maybe more framing of the context. What kind of data storage? Object vs Block vs what?
% \begin{frame}{``Stateless'', ``serverless'', and the elephant in the room}
% It seems easy to deploy \& administer web services nowadays ...
% Because the inherent complexity is shadowed by proprietary ``cloud'' solutions.
% The IT crowd can gloss over ``statelessness'' \emph{ad nauseam} ...
% But storing \emph{state} remains an open research problem.
% Data storage is either:
% \begin{itemize}
% \item A single point of failure;
% \item Delegated to proprietary solutions;
% \item Pain.
% \end{itemize}
% Today, we will review networked storage's history, and discuss open research questions.
% \end{frame}

70
doc/talks/2021-04-28_spirals-team/main.tex Normal file
View file

@ -0,0 +1,70 @@
\documentclass[compress]{beamer}
\input{header.tex}
%% Metadata %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\title{Distributed object storage is centralised}
\subtitle{A quest for autonomy in the modern hosting ecology}
\author{Adrien Luxey}
\date{Wednesday, 28th April, 2021}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Begin document %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
%% Title page %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
{
\setbeamertemplate{footline}{}
\setbeamertemplate{headline}{}
\begin{frame}
\titlepage
\end{frame}
}
%% Contents %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\input{introduction.tex}
\input{sota.tex}
\input{escaping_the_cloud.tex}
\input{garage.tex}
\input{conclusion.tex}
%% Bibliography %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \begin{frame}
% \large
% \raggedright
% Références
% \printbibliography
% \end{frame}
%% Ending %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
{
\setbeamertemplate{footline}{}
\setbeamertemplate{headline}{}
\begin{frame}
\centering
\vspace{1cm}
\Large Thank you for your attention.
\vspace{2cm}
\large Now let's chat!
\vspace{1cm}
\raggedleft
\includegraphics[width=.2\textwidth]{figures/m_proxy_gray.pdf}
\end{frame}
}
%% Appendices %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \appendix
% \input{sprinkler_appendix.tex}
% \input{cascade_appendix.tex}
% \input{spores_appendix.tex}
\end{document}

323
doc/talks/2021-04-28_spirals-team/sota.tex Normal file
View file

@ -0,0 +1,323 @@
\section{State of the art}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{The CAP theorem}{Consistency vs. Availability}
\begin{block}{Eric Brewer's theorem}
``A shared-state system can have \textbf{at most two} of the following properties at any given time:
\begin{itemize}
\item \textbf{C}onsistency
\item \textbf{A}vailability
\item \textbf{P}artition tolerance''
\end{itemize}
\end{block}
\begin{center}
\Large
Under network partitions, a distributed data store has to sacrifice either availability or consistency.
\end{center}
\vfill
\begin{itemize}
\item \textbf{Consistency-first}: Abort incoming queries;
\item \textbf{Availability-first}: Return possibly stale data.
\end{itemize}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Consistency-first: the ACID model}{Consistency vs. Availability}
\textbf{Transaction}: unit of work within an ACID data store.
%Comprises multiple operations.
%E.g. bank transfer.
%E.g. a bank transfer from A to B is a transaction involving two operations: withdraw money from A & credit B with the same money amount.
\vfill
\begin{itemize}
\item \textbf{\underline{A}tomicity}: Transactions either complete entirely or fail.
No transaction ever seen as in-progress.
\item \textbf{\underline{C}onsistency}: Transactions always generate a valid state.
The database maintains its invariants across transactions.
\item \textbf{\underline{I}solation}: Concurrent transactions are seen as sequential.
Transactions are serializable, or sequentially consistent.
\item \textbf{\underline{D}urability}: Committed transactions are never forgotten.
\end{itemize}
\vfill\centering
Reads are fast, writes are slow.
\vfill\raggedright
Example: relational databases.
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}[fragile]{Concurrent writes in ACID}{Consistency vs. Availability}
\begin{columns}
\column{.5\columnwidth}
\begin{block}{}
\begin{lstlisting}
transaction AcqDoses(y):
x <- SELECT #vaccines;
UPDATE #vaccines = (x + y);
\end{lstlisting}
\end{block}
\vspace{5ex}
Supports compound operations.
\column{.5\columnwidth}
\centering
\includegraphics[width=\columnwidth]{figures/conflict_acid.pdf}
\end{columns}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Availability-first: the BASE model}{Consistency vs. Availability}
Some apps prefer availability, e.g. Amazon products' reviews.
\vfill
The BASE model trades Consistency \& Isolation for Availability.
%Some applications do not care about strong consistency and prefer being highly available (e.g. Amazon's product reviews).
%In order to achieve higher availability, the BASE model relaxes consistency constraints of the ACID model: "eventual consistency".
\vfill
\begin{itemize}
\item \textbf{\underline{B}asic \underline{A}vailability}:
The data store thrives to be available.
\item \textbf{\underline{S}oft-state}:
Replicas can disagree on the valid state.
\item \textbf{\underline{E}ventual consistency}:
In the absence of write queries,
the data store will eventually converge to a single valid state.
\end{itemize}
\vfill\centering
Writes are fast, reads are slow.
\vfill\raggedright
Examples: key-value \& object stores.
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Concurrent writes in BASE}{Consistency vs. Availability}
\begin{columns}
\column{.5\columnwidth}
\begin{block}{Object}
\begin{itemize}
\item Unique key
\item Arbitrary value
\item Metadata
\end{itemize}
\end{block}
\vspace{5ex}
Conflict resolution = client's job!
\vspace{5ex}
No compound operations.
\column{.5\columnwidth}
\centering
\includegraphics[width=\columnwidth]{figures/conflict_base.pdf}
\end{columns}
% KV storage is another example, distinction is minor here
% Object = unique key, arbitrary value, metadata.
% Object storage only provides semantics to investigate causal order of queries *for individual objects*. No compound operations, no transactions.
% Much easier to distribute, and "scale-out".
% Write is fast, read is slow (gotta collect all object versions).
% \todo{vaccines example with BASE model}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Strong Eventual Consistency w/ CRDTs}{Consistency vs. Availability}
\centering\small
\fullcite{defago_conflict-free_2011}
\vfill\raggedright\normalsize
\begin{block}{Strong Eventual Consistency (SEC)}
\begin{itemize}
\item CRDTs specify distributed operations
\item Conflicts will be solved according to specification
\item Proven \& bound eventual convergence
\end{itemize}
\end{block}
\vfill\centering
\includegraphics[width=.5\columnwidth]{figures/crdt.pdf}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}[fragile]{Concurrent writes with CRDTs}{Consistency vs. Availability}
\begin{columns}
\column{.5\columnwidth}
\begin{block}{}
\begin{lstlisting}
CRDT Counter(x0):
history = {}
op. incr(y):
history U= {(UUID(), y)}
op. decr(y):
history U= {(UUID(), -y)}
op. read():
x = x0
for (_, y) in history:
x += y
return x
\end{lstlisting}
\end{block}
\vspace{2ex}
Operations commute?
$\implies$ screw total order!
\column{.5\columnwidth}
\centering
\includegraphics[width=\columnwidth]{figures/conflict_crdt.pdf}
\end{columns}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{A complex CRDT: the DAG}{Consistency vs. Availability}
\centering
\only<1>{\includegraphics[height=\textheight]{figures/dag_crdt.png}}%
\only<2>{
Just to say I swept a lot under the rug.
\vfill
For details, go read:
\fullcite{defago_conflict-free_2011}
\vfill
For an implementation, check \textbf{AntidoteDB}.
}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{State of the practice}{Path dependency to the ``cloud''}
\begin{block}{The BASE model is fashionable because}
\centering
``\emph{High-performance} object storage for \emph{AI analytics} with PBs of \emph{IoT data streams} at the \emph{edge}, using \emph{5G}.''
% \begin{itemize}
% \item Highest performance
% \item IoT data streams are inherently distributed
% \end{itemize}
\end{block}
\vfill\centering
\includegraphics[width=.9\columnwidth]{figures/minio_edge.png}
\vfill\raggedright
%\begin{block}{}
\begin{itemize}
\item Always backed by cloud: high performance network links.
\item Edge nodes always seen as clients or data sources, not peers.
\end{itemize}
%\end{block}
% There is \textbf{always a central cloud cluster} in these use-cases.
% Hidden constraint: \textbf{high performance inter-node connectivity}.
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \begin{frame}{A brief history of storage}
% We keep it short because we'll follow chronological order in the next section too.
% \end{frame}
% \begin{frame}{In the beginning, there were \emph{monoliths}}
% \includegraphics[width=.5\columnwidth]{figures/stonehenge.jpg}
% Web applications used to be monolithic:
% \begin{itemize}
% \item One or two servers;
% \item Availability was not an obsession;
% \item Latency was acceptable.
% \end{itemize}
% Relational databases were queens.
% \end{frame}
% \begin{frame}{Then came \emph{expectations}}
% Then, the whole world went online, and suddenly: expectations!
% \begin{itemize}
% \item ``Milliseconds matter.'' (Algolia slogan)
% \item Critical networked services (healthcare, logistics) need 100\% availability
% \end{itemize}
% $\implies$ Microservices \& horizontal scalability.
% \todo{Develop on the `herd not sheep' paradigm a bit.}
% \end{frame}
% \begin{frame}{Distributing state/storage: the remaining unknown}
% The microservices orchestration game works well for \emph{stateless} services.
% However, any application requires \emph{state}, persistent data.
% And this is tough. As we will now see.
% (Not that it's not well studied: distributed storage has always been fashionable.)
% \end{frame}

BIN
doc/talks/2021-04-28_spirals-team/talk.pdf Normal file
View file

Binary file not shown.