2.0 KiB
jepsen.garage
Jepsen checking of Garage consistency properties.
Usage
Requirements:
- vagrant
- VirtualBox, configured so that nodes can take an IP in a private network
192.168.56.0/24 - a user that can create VirtualBox VMs
- leiningen
- gnuplot
Set up VMs:
vagrant up
Run tests (this one should fail):
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
Register linear, without timestamp patch
Command: lein run test --nodes-file nodes.vagrant --time-limit 60 --rate 20 --concurrency 20 --workload reg --ops-per-key 100
Results: fails with a simple clock-scramble nemesis.
Explanation: without the timestamp patch, nodes will create objects using their local clock only as a timestamp, so the ordering will be all over the place if clocks are scrambled.
Register linear, with timestamp patch
Command: lein run test --nodes-file nodes.vagrant --time-limit 60 --rate 20 --concurrency 20 --workload reg --ops-per-key 100 -I
Results:
- No failure with clock-scramble nemesis
- Fails with clock-scramble nemesis + partition nemesis
Explanation: S3 objects are not meant to behave like linearizable registers. TODO explain using a counter-example
Read-after-write CRDT register model: TODO: determine the expected semantics of such a register, code a checker and show that results are correct
Set, basic test
Command: lein run test --nodes-file nodes.vagrant --time-limit 60 --rate 20 --concurrency 20 --workload set1 --ops-per-key 100
Results:
- ListObjects returns objects not within prefix????
License
Copyright © 2023 Alex Auvolat
This program and the accompanying materials are made available under the terms of the GNU Affero General Public License v3.0.