Bug 1398859

Summary:	tier: performance improvement with multi-threaded brick processing
Product:	[Community] GlusterFS	Reporter:	Milind Changire <mchangir>
Component:	tiering	Assignee:	Milind Changire <mchangir>
Status:	CLOSED WONTFIX	QA Contact:	bugs <bugs>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	mainline	CC:	bugs
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Last Closed:	2018-11-02 08:15:27 UTC	Type:	Bug
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Description Milind Changire 2016-11-26 17:49:26 UTC

Description of problem:
Tier sequentially processes brick heat databases for promotions as well as demotions.


Expected results:
Promotions and demotions at multiple bricks can be performed in parallel to improve performance.

Comment 1 Worker Ant 2016-11-26 17:59:25 UTC

REVIEW: http://review.gluster.org/15931 (cluster/tier: multithreaded promotion and demotion) posted (#1) for review on master by Milind Changire (mchangir)

Comment 2 Worker Ant 2016-11-27 14:01:14 UTC

REVIEW: http://review.gluster.org/15931 (cluster/tier: multithreaded promotion and demotion) posted (#2) for review on master by Milind Changire (mchangir)

Comment 3 Worker Ant 2016-11-27 16:37:13 UTC

REVIEW: http://review.gluster.org/15931 ([wip] cluster/tier: multithreaded promotion and demotion) posted (#3) for review on master by Milind Changire (mchangir)

Comment 4 Worker Ant 2016-11-28 16:14:46 UTC

REVIEW: http://review.gluster.org/15931 ([wip] cluster/tier: multithreaded promotion and demotion) posted (#4) for review on master by Milind Changire (mchangir)

Comment 5 Worker Ant 2016-11-29 15:43:55 UTC

REVIEW: http://review.gluster.org/15931 ([wip] cluster/tier: multithreaded promotion and demotion) posted (#5) for review on master by Milind Changire (mchangir)

Comment 6 Worker Ant 2016-12-07 13:22:50 UTC

REVIEW: http://review.gluster.org/15931 ([wip] cluster/tier: multithreaded promotion and demotion) posted (#6) for review on master by Milind Changire (mchangir)

Comment 7 Worker Ant 2016-12-07 14:41:49 UTC

REVIEW: http://review.gluster.org/15931 ([wip] cluster/tier: multithreaded promotion and demotion) posted (#7) for review on master by Milind Changire (mchangir)

Comment 8 Worker Ant 2016-12-08 07:58:59 UTC

REVIEW: http://review.gluster.org/15931 ([wip] cluster/tier: multithreaded promotion and demotion) posted (#8) for review on master by Milind Changire (mchangir)

Comment 9 Worker Ant 2016-12-16 09:14:11 UTC

REVIEW: http://review.gluster.org/15931 ([wip] cluster/tier: multithreaded promotion and demotion) posted (#9) for review on master by Milind Changire (mchangir)

Comment 10 Worker Ant 2016-12-16 09:22:15 UTC

REVIEW: http://review.gluster.org/15931 ([wip] cluster/tier: multithreaded promotion and demotion) posted (#10) for review on master by Milind Changire (mchangir)

Comment 11 Amar Tumballi 2018-11-02 08:15:27 UTC

Patch https://review.gluster.org/#/c/glusterfs/+/21331/ removes tier functionality from GlusterFS. 

https://bugzilla.redhat.com/show_bug.cgi?id=1642807 is used as the tracking bug for this. Recommendation is to convert your tier volume to regular volume (either replicate, ec, or plain distribute) with "tier detach" command before upgrade, and use backend features like dm-cache etc to utilize the caching from backend to provide better performance and functionality.