Bug 1245689 - ec sequentializes all reads, limiting read throughtput
Summary: ec sequentializes all reads, limiting read throughtput
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: GlusterFS
Classification: Community
Component: disperse
Version: mainline
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Xavi Hernandez
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1251467
TreeView+ depends on / blocked
 
Reported: 2015-07-22 14:21 UTC by Xavi Hernandez
Modified: 2016-06-16 13:26 UTC (History)
2 users (show)

Fixed In Version: glusterfs-3.8rc2
Clone Of:
: 1251467 (view as bug list)
Environment:
Last Closed: 2016-06-16 13:26:24 UTC
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Embargoed:


Attachments (Terms of Use)

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:
1.
2.
3.

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


Note You need to log in before you can comment on or make changes to this bug.