95bd778fcc
The only way to get reasonable performance out of all three databases (mariadb, mysql, postgres) appears to be to make the following changes: * Use group-by instead of distinct. Some versions of mysql produce the wrong output with distinct; this is more descriptive of what we want anyway. * Split the query into two statements instead of joining on a subquery. Mariadb seems to be unable to produce a good query plan for the buildset list query. Neither mariadb nor mysql support using "IN" with a subquery (so the idea of using IN instead of JOIN for the subquery is out). These methods now perform a query to get the ids of the builds or buildsets that match the criteria, then perform a second query to load the ORM objects that match those ids. This appears to be quite fast for all three queries with the latest versions of all three database systems. Change-Id: I30bb3214807dfa8b26a848f85bb7a7bc660c6c1d
Zuul
Zuul is a project gating system.
The latest documentation for Zuul v3 is published at: https://zuul-ci.org/docs/zuul/
If you are looking for the Edge routing service named Zuul that is related to Netflix, it can be found here: https://github.com/Netflix/zuul
If you are looking for the Javascript testing tool named Zuul, it can be found here: https://github.com/defunctzombie/zuul
Getting Help
There are two Zuul-related mailing lists:
- zuul-announce
-
A low-traffic announcement-only list to which every Zuul operator or power-user should subscribe.
- zuul-discuss
-
General discussion about Zuul, including questions about how to use it, and future development.
You will also find Zuul developers on Matrix <https://matrix.to/#/#zuul:opendev.org>.
Contributing
To browse the latest code, see: https://opendev.org/zuul/zuul To clone the latest code, use git clone https://opendev.org/zuul/zuul
Bugs are handled at: https://storyboard.openstack.org/#!/project/zuul/zuul
Suspected security vulnerabilities are most appreciated if first reported privately following any of the supported mechanisms described at https://zuul-ci.org/docs/zuul/user/vulnerabilities.html
Code reviews are handled by gerrit at https://review.opendev.org
After creating a Gerrit account, use git review to submit patches. Example:
# Do your commits
$ git review
# Enter your username if promptedJoin us on Matrix to discuss development or usage.
License
Zuul is free software. Most of Zuul is licensed under the Apache License, version 2.0. Some parts of Zuul are licensed under the General Public License, version 3.0. Please see the license headers at the tops of individual source files.
Python Version Support
Zuul requires Python 3. It does not support Python 2.
Since Zuul uses Ansible to drive CI jobs, Zuul can run tests anywhere Ansible can, including Python 2 environments.