resource_versions in agents state reports led to performance degradation
Bug #1567497 reported by
Oleg Bondarev
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
neutron |
Fix Released
|
High
|
Oleg Bondarev |
Bug Description
resource_versions were included into agent state reports recently to support rolling upgrades (commit 97a272a892fcf48
The downside is that it brought additional processing when handling state reports on server side: update of local resources versions cache and more seriously rpc casts to all other servers to do the same.
All this led to a visible performance degradation at scale with hundreds of agents constantly sending reports. Under load (rally test) agents may start "blinking" which makes cluster very unstable.
Need to optimize agents notifications about resource_versions.
Changed in neutron: | |
status: | New → In Progress |
tags: | added: neutron-proactive-backport-potential |
tags: | removed: neutron-proactive-backport-potential |
tags: | removed: mitaka-backport-potential |
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review is here https:/ /review. openstack. org/#/c/ 302792