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Bug 1245689

Summary:	ec sequentializes all reads, limiting read throughtput
Product:	[Community] GlusterFS	Reporter:	Xavi Hernandez <jahernan>
Component:	disperse	Assignee:	Xavi Hernandez <jahernan>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	mainline	CC:	bugs, pkarampu
Target Milestone:	---	Keywords:	Reopened, Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	glusterfs-3.8rc2	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1251467 (view as bug list)		Environment:
Last Closed:	2016-06-16 13:26:24 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:	1251467

Description Xavi Hernandez 2015-07-22 14:21:07 UTC

Description of problem:

ec needs to issue locks for reads, so it uses the same management functions used for writes. This means that reads are sent one by one in sequence. Since reads do not touch any state of the file, there could be multiple read requests running at the same time, improving read performance.

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


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

Comment 1 Anand Avati 2015-07-22 15:12:09 UTC

REVIEW: http://review.gluster.org/11742 (cluster/ec: Allow read fops to be processed in parallel) posted (#1) for review on master by Xavier Hernandez (xhernandez)

Comment 2 Anand Avati 2015-07-29 03:17:15 UTC

REVIEW: http://review.gluster.org/11742 (cluster/ec: Allow read fops to be processed in parallel) posted (#2) for review on master by Pranith Kumar Karampuri (pkarampu)

Comment 3 Anand Avati 2015-07-29 07:38:38 UTC

REVIEW: http://review.gluster.org/11742 (cluster/ec: Allow read fops to be processed in parallel) posted (#3) for review on master by Xavier Hernandez (xhernandez)

Comment 4 Anand Avati 2015-08-06 11:26:34 UTC

REVIEW: http://review.gluster.org/11742 (cluster/ec: Allow read fops to be processed in parallel) posted (#4) for review on master by Xavier Hernandez (xhernandez)

Comment 5 Anand Avati 2015-08-11 08:23:27 UTC

REVIEW: http://review.gluster.org/11742 (cluster/ec: Allow read fops to be processed in parallel) posted (#5) for review on master by Xavier Hernandez (xhernandez)

Comment 6 Niels de Vos 2016-06-16 13:26:24 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-3.8.0, please open a new bug report.

glusterfs-3.8.0 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://blog.gluster.org/2016/06/glusterfs-3-8-released/
[2] http://thread.gmane.org/gmane.comp.file-systems.gluster.user