jepsen: updated results, confirming that task3 works

script/jepsen.garage/.gitignore

@@ -13,4 +13,5 @@ pom.xml.asc
 .hg/
 .direnv
 /store
+/store.*
 .vagrant

script/jepsen.garage/README.md

@@ -7,29 +7,19 @@ Jepsen checking of Garage consistency properties.
 Requirements:
 
 - vagrant
-- VirtualBox, configured so that nodes can take an IP in a private network `192.168.56.0/24`
+- VirtualBox, configured so that nodes can take an IP in a private network `192.168.56.0/24` (it's the default)
 - a user that can create VirtualBox VMs
 - leiningen
 - gnuplot
 
-Set up VMs:
+Set up VMs before running tests:
 
 ```
 vagrant up
 ```
 
-Run tests (this one should fail):
+Run tests: see commands below.
 
-```
-lein run test --nodes-file nodes.vagrant --time-limit 64 --concurrency 50 --rate 50 --workload reg
-```
-
-These ones are working:
-
-```
-lein run test --nodes-file nodes.vagrant --time-limit 64 --rate 50  --concurrency 50 --workload set1
-lein run test --nodes-file nodes.vagrant --time-limit 64 --rate 50  --concurrency 50 --workload set2
-```
 
 ## Results
 
@@ -73,16 +63,19 @@ Results with timestamp patch (`--patch tsfix2`):
   Example of a failed run: `garage reg2/20231024T120806.899+0200`.
   This is the failure mode we are looking for and trying to fix for NLnet task 3.
 
-- Changes brought by NLnet task 3 code (commit 707442f5de):
+Results with NLnet task 3 code (commit 707442f5de, `--patch task3a`):
-  no failures with `--scenario r` (0 of 10 runs), `--scenario pr` (0 of 10 runs),
+
+- No failures with `--scenario r` (0 of 10 runs), `--scenario pr` (0 of 10 runs),
   `--scenario cpr` (0 of 10 runs) and `--scenario dpr` (0 of 10 runs).
 
+- Same with `--patch task3c` (commit `0041b013`, the final version).
+
 
 ### Set, basic test (write some items, then read)
 
-Command: `lein run test --nodes-file nodes.vagrant --time-limit 60 --rate 200  --concurrency 200 --workload set1 --ops-per-key 100 --patch tsfix2`
+Command: `lein run test --nodes-file nodes.vagrant --time-limit 60 --rate 200  --concurrency 200 --workload set1 --ops-per-key 100`
 
-Results:
+Results without NLnet task3 code (`--patch tsfix2`):
 
 - For now, no failures with clock-scramble nemesis + partition nemesis -> TODO long test run
 
@@ -90,15 +83,22 @@ Results:
 
 - **Fails with the partition + layout reconfiguration nemesis** (`--scenario pr`).
   Example of a failed run: `garage set1/20231024T172214.488+0200` (1 failure in 4 runs).
-  TODO: investigate.
   This is the failure mode we are looking for and trying to fix for NLnet task 3.
 
+Results with NLnet task 3 code (commit 707442f5de, `--patch task3a`):
+
+- The tests are buggy and often result in an "unknown" validity status, which
+  is caused by some requests not returning results during network partitions or
+  other nemesis-induced broken cluster states.  However, when the tests were
+  able to finish, there were no failures with scenarios `r`, `pr`, `cpr`,
+  `dpr`.
+
 
 ### Set, continuous test (interspersed reads and writes)
 
-Command: `lein run test --nodes-file nodes.vagrant --time-limit 60 --rate 100  --concurrency 100 --workload set2 --ops-per-key 100 --patch tsfix2`
+Command: `lein run test --nodes-file nodes.vagrant --time-limit 60 --rate 100  --concurrency 100 --workload set2 --ops-per-key 100`
 
-Results:
+Results without NLnet task3 code (`--patch tsfix2`):
 
 - No failures with clock-scramble nemesis + db nemesis + partition nemesis (`--scenario cdp`) (0 failures in 10 runs).
 
@@ -106,17 +106,26 @@ Results:
   Example of a failed run: `garage set2/20231025T141940.198+0200` (10 failures in 10 runs).
   This is the failure mode we are looking for and trying to fix for NLnet task 3.
 
-- Changes brought by NLnet task 3 code (commit 707442f5de):
+Results with NLnet task3 code (commit 707442f5de, `--patch task3a`):
-  no failures with `--scenario r` (0 of 10 runs), `--scenario pr` (0 of 10 runs).
+
+- No failures with `--scenario r` (0 of 10 runs), `--scenario pr` (0 of 10 runs),
   `--scenario cpr` (0 of 10 runs) and `--scenario dpr` (0 of 10 runs).
 
+- Same with `--patch task3c` (commit `0041b013`, the final version).
+
+
+## NLnet task 3 final results
+
+- With code from task3 (`--patch task3c`): [reg2 and set2](results/Results-2023-12-13-task3c.png), [set1](results/Results-2023-12-14-task3-set1.png).
+- Without (`--patch tsfix2`): [reg2 and set2](results/Results-2023-12-13-tsfix2.png), set1 TBD.
 
 ## Investigating (and fixing) errors
 
 ### Segfaults
 
 They are due to the download being interrupted in the middle (^C during first launch on clean VMs), the `garage` binary is truncated.
-Add `:force?` to the `cached-wget!` call in `daemon.clj` to re-download the binary.
+Add `:force?` to the `cached-wget!` call in `daemon.clj` to re-download the binary,
+or restar the VMs to clear temporary files.
 
 ### In `jepsen.garage`: prefix wierdness
 

script/jepsen.garage/Vagrantfile

@@ -29,4 +29,12 @@ Vagrant.configure("2") do |config|
   config.vm.define "n5" do |config| vm(config, "n5", "192.168.56.25") end
   config.vm.define "n6" do |config| vm(config, "n6", "192.168.56.26") end
   config.vm.define "n7" do |config| vm(config, "n7", "192.168.56.27") end
+
+  config.vm.define "n8" do |config| vm(config, "n8", "192.168.56.28") end
+  config.vm.define "n9" do |config| vm(config, "n9", "192.168.56.29") end
+  config.vm.define "n10" do |config| vm(config, "n10", "192.168.56.30") end
+  config.vm.define "n11" do |config| vm(config, "n11", "192.168.56.31") end
+  config.vm.define "n12" do |config| vm(config, "n12", "192.168.56.32") end
+  config.vm.define "n13" do |config| vm(config, "n13", "192.168.56.33") end
+  config.vm.define "n14" do |config| vm(config, "n14", "192.168.56.34") end
 end

script/jepsen.garage/all_tests_1.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+set -x
+
+#for ppatch in task3c task3a tsfix2; do
+for ppatch in tsfix2; do
+	#for psc in c cp cdp r pr cpr dpr; do
+	for psc in cdp r pr cpr dpr; do
+		#for ptsk in reg2 set1 set2; do
+		for ptsk in set1; do
+			for irun in $(seq 10); do
+				lein run test --nodes-file nodes.vagrant \
+					--time-limit 60 --rate 100  --concurrency 100 --ops-per-key 100 \
+					--workload $ptsk --patch $ppatch --scenario $psc
+			done
+		done
+	done
+done

script/jepsen.garage/all_tests_2.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -x
+
+#for ppatch in task3c tsfix2; do
+for ppatch in tsfix2; do
+	for psc in cdp r pr cpr dpr; do
+		for ptsk in set1; do
+			for irun in $(seq 10); do
+				lein run test --nodes-file nodes2.vagrant \
+					--time-limit 60 --rate 100  --concurrency 100 --ops-per-key 100 \
+					--workload $ptsk --patch $ppatch --scenario $psc
+			done
+		done
+	done
+done

script/jepsen.garage/nodes2.vagrant

@@ -0,0 +1,7 @@
+192.168.56.28
+192.168.56.29
+192.168.56.30
+192.168.56.31
+192.168.56.32
+192.168.56.33
+192.168.56.34

script/jepsen.garage/src/jepsen/garage.clj

@@ -36,7 +36,9 @@
   {"default" "v0.9.0"
    "tsfix1" "d146cdd5b66ca1d3ed65ce93ca42c6db22defc09"
    "tsfix2" "c82d91c6bccf307186332b6c5c6fc0b128b1b2b1"
-   "task3a" "707442f5de416fdbed4681a33b739f0a787b7834"})
+   "task3a" "707442f5de416fdbed4681a33b739f0a787b7834"
+   "task3b" "431b28e0cfdc9cac6c649193cf602108a8b02997"
+   "task3c" "0041b013a473e3ae72f50209d8f79db75a72848b"})
 
 (def cli-opts
   "Additional command line options."
@@ -69,7 +71,7 @@
     (merge tests/noop-test
            opts
            {:pure-generators  true
-            :name             (str "garage " (name (:workload opts)) " " (name (:scenario opts)) " " (name (:patch opts)))
+            :name             (str "garage-" (name (:patch opts)) " " (name (:workload opts)) " " (name (:scenario opts)))
             :os               debian/os
             :db               db
             :client           (:client workload)
@@ -83,7 +85,9 @@
                                 (gen/nemesis (:final-generator scenario))
                                 (gen/log "Waiting for recovery")
                                 (gen/sleep 10)
-                                (gen/clients (:final-generator workload)))
+                                (gen/log "Running final generator")
+                                (gen/clients (:final-generator workload))
+                                (gen/log "Generators all done"))
             :nemesis          (:nemesis scenario)
             :checker          (checker/compose
                                 {:perf (checker/perf (:perf scenario))

script/jepsen.garage/src/jepsen/garage/set.clj

@@ -108,11 +108,13 @@
                           (->> (range)
                            (map (fn [x] {:type :invoke, :f :add, :value x}))
                            (gen/limit (:ops-per-key opts)))))
-   :final-generator   (gen/phases
+   :final-generator   (independent/concurrent-generator
-                        (independent/sequential-generator
+                        10
                         (range 100)
-                          (fn [k] (gen/once op-read)))
+                        (fn [k]
-                        (gen/sleep 5))})
+                          (gen/phases
+                            (gen/once op-read)
+                            (gen/sleep 5))))})
 
 (defn workload2
   "Tests insertions and deletions"