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Add 12 lattice diagrams to explain CRDTs and quorums

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Alex Auvolat 2023-01-12 17:17:13 +01:00
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commit f5a7bc3736
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15 changed files with 6658 additions and 11 deletions
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doc/talks/2023-01-18-tocatta/Makefile
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@ -4,6 +4,18 @@ ASSETS=assets/consistent_hashing_1.pdf \
assets/consistent_hashing_4.pdf \
assets/garage_tables.pdf \
assets/consensus.pdf_tex \
assets/lattice1.pdf_tex \
assets/lattice2.pdf_tex \
assets/lattice3.pdf_tex \
assets/lattice4.pdf_tex \
assets/lattice5.pdf_tex \
assets/lattice6.pdf_tex \
assets/lattice7.pdf_tex \
assets/lattice8.pdf_tex \
assets/lattice9.pdf_tex \
assets/latticeA.pdf_tex \
assets/latticeB.pdf_tex \
assets/latticeC.pdf_tex \
assets/deuxfleurs.pdf
talk.pdf: talk.tex $(ASSETS)

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sodipodi:role="line"
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doc/talks/2023-01-18-tocatta/talk.pdf
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doc/talks/2023-01-18-tocatta/talk.tex
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@ -494,8 +494,7 @@
\item \textbf{Linearizability} of all operations\\
(strongest consistency guarantee)
\vspace{1em}
\item \textbf{Replicated state machines} that can implement
any sequential specification
\item Any sequential specification can be implemented as a \textbf{replicated state machine}
\vspace{1em}
\item \textbf{Costly}, the leader is a bottleneck;
leader elections on failure take time
@ -515,7 +514,7 @@
\item \textbf{Operations have to commute}, i.e.~we
can only implement CRDTs
\vspace{1em}
\item \textbf{Fast}, no node is a bottleneck;\\
\item \textbf{Fast}, no single bottleneck;\\
works the same with offline nodes
\end{itemize}
} \end{minipage}
@ -530,27 +529,29 @@
\vspace{2em}
\hspace{1em}
\begin{minipage}{7cm}
\begin{minipage}{6.5cm}
\underline{Consensus-based systems:}
\vspace{1em}
\textbf{Any sequential specification}\\~
\vspace{1em}
\textbf{Easier to program for}: just write your program as if it were sequential on a single machine
\end{minipage}
\hfill
\begin{minipage}{7cm}
\begin{minipage}{6.5cm}
\underline{Weakly consistent systems:}
\vspace{1em}
\textbf{CRDTs only}\\(conflict-free replicated data types)
\vspace{1em}
Part of the complexity is \textbf{reported to the consumer of the API}\\~
\end{minipage}
\hspace{1em}
\vspace{3em}
\begin{center}
Part of the complexity is \textbf{reported to the consumer of the API}
\end{center}
\end{frame}
\begin{frame}
@ -663,7 +664,27 @@
\end{frame}
\begin{frame}
\frametitle{Impact on performances}
\frametitle{Understanding CRDTs and quorums}
\begin{figure}
\centering
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\begin{frame}
\frametitle{Performance gains in practice}
\begin{center}
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