[Bug 1838858] Re: backport GC AIO to Luminous
Dan Hill
1838858 at bugs.launchpad.net
Wed Sep 18 22:20:55 UTC 2019
The issues and fixes discuss in comments #3 and #4 are being tracked
under lp#1843085.
They have AIO GC as a dependency, but are not required for this SRU.
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https://bugs.launchpad.net/bugs/1838858
Title:
backport GC AIO to Luminous
Status in Ubuntu Cloud Archive:
Invalid
Status in Ubuntu Cloud Archive pike series:
Won't Fix
Status in Ubuntu Cloud Archive queens series:
In Progress
Status in ceph package in Ubuntu:
Invalid
Status in ceph source package in Bionic:
Fix Committed
Bug description:
[Impact]
In RGW deployments with large deltas for deleted objects, the garbage collector will easily fall behind on cleanup of deleted objects eventually resulting in OSD devices hitting storage capacity.
[Test Case]
Deploy Ceph + RADOS Gateway
Create millions of objects in an iterative loop
Start deleting objects in parallel at a high rate
Storage capacity will gradually reduce over time as RGW garbage collection falls behind.
[Tricky to reproduce without significant scale of objects + deletion
but proposed fix has been tested in the field.]
[Regression Potential]
Low - fix has been accepted into Ceph Luminous upstream and will form part of the next point release. Change to use AIO for GC is also in later Ceph releases.
[Original Bug Report]
SRU for backport of the GC AIO feature to Ceph Luminous.
https://github.com/ceph/ceph/pull/28784
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