[Bugs] [Bug 1251467] New: ec sequentializes all reads, limiting read throughtput

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1251467

            Bug ID: 1251467
           Summary: ec sequentializes all reads, limiting read throughtput
           Product: GlusterFS
           Version: 3.7.3
         Component: disperse
          Keywords: Triaged
          Assignee: bugs at gluster.org
          Reporter: xhernandez at datalab.es
                CC: bugs at gluster.org, gluster-bugs at redhat.com
        Depends On: 1245689



+++ This bug was initially created as a clone of Bug #1245689 +++

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:

--- Additional comment from Anand Avati on 2015-07-22 17:12:09 CEST ---

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 at datalab.es)

--- Additional comment from Anand Avati on 2015-07-29 05:17:15 CEST ---

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 at redhat.com)

--- Additional comment from Anand Avati on 2015-07-29 09:38:38 CEST ---

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 at datalab.es)

--- Additional comment from Anand Avati on 2015-08-06 13:26:34 CEST ---

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 at datalab.es)


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1245689
[Bug 1245689] ec sequentializes all reads, limiting read throughtput
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