Bug 1468191

Summary:	Enable stat-prefetch in group virt
Product:	[Community] GlusterFS	Reporter:	Krutika Dhananjay <kdhananj>
Component:	core	Assignee:	Krutika Dhananjay <kdhananj>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	mainline	CC:	bugs
Target Milestone:	---	Keywords:	Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	glusterfs-3.12.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-09-05 17:36:29 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1468484

Description Krutika Dhananjay 2017-07-06 09:18:15 UTC

Description of problem:

We saw improvement in IOPs as part of performance improvement effort for gluster with vm store use case. As per volume profile data collected, qemu sends almost as many stats as the number of reads in pure random read workload. With stat-prefetch on, the number of stats hitting the disk got reduced to < 100.

Version-Release number of selected component (if applicable):


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Comment 1 Worker Ant 2017-07-06 09:24:20 UTC

REVIEW: https://review.gluster.org/17713 (extras: Enable stat-prefetch in virt profile) posted (#1) for review on master by Krutika Dhananjay (kdhananj)

Comment 2 Worker Ant 2017-07-10 07:53:39 UTC

COMMIT: https://review.gluster.org/17713 committed in master by Pranith Kumar Karampuri (pkarampu) 
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commit f28b5d1007644749761fd374d951b72ace2e203e
Author: Krutika Dhananjay <kdhananj>
Date:   Thu Jul 6 14:25:09 2017 +0530

    extras: Enable stat-prefetch in virt profile
    
    In the internal testing that was done, stat-prefetch did help
    reduce the number of stats coming from qemu hitting the disk,
    and thereby improved performance.
    
    Change-Id: Icf1ce62ecf4e96b97e1946a77b30434157a7786a
    BUG: 1468191
    Signed-off-by: Krutika Dhananjay <kdhananj>
    Reviewed-on: https://review.gluster.org/17713
    CentOS-regression: Gluster Build System <jenkins.org>
    Smoke: Gluster Build System <jenkins.org>
    Reviewed-by: Amar Tumballi <amarts>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu>

Comment 3 Shyamsundar 2017-09-05 17:36:29 UTC

This bug is getting closed because a release has been made available that should address the reported issue. In case the problem is still not fixed with glusterfs-3.12.0, please open a new bug report.

glusterfs-3.12.0 has been announced on the Gluster mailinglists [1], packages for several distributions should become available in the near future. Keep an eye on the Gluster Users mailinglist [2] and the update infrastructure for your distribution.

[1] http://lists.gluster.org/pipermail/announce/2017-September/000082.html
[2] https://www.gluster.org/pipermail/gluster-users/