Bug 1335818 - Revert "features/shard: Make o-direct writes work with sharding: http://review.gluster.org/#/c/13846/"
Summary: Revert "features/shard: Make o-direct writes work with sharding: http://revie...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: GlusterFS
Classification: Community
Component: sharding
Version: mainline
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Krutika Dhananjay
QA Contact: bugs@gluster.org
URL:
Whiteboard:
Depends On:
Blocks: 1335821 1335822
TreeView+ depends on / blocked
 
Reported: 2016-05-13 09:44 UTC by Krutika Dhananjay
Modified: 2017-03-27 18:11 UTC (History)
1 user (show)

Fixed In Version: glusterfs-3.9.0
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1335821 1335822 (view as bug list)
Environment:
Last Closed: 2017-03-27 18:11:09 UTC
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Embargoed:


Attachments (Terms of Use)

Description Krutika Dhananjay 2016-05-13 09:44:00 UTC
Description of problem:
Revert this patch for two reasons:

1) It introduces high fop latencies
2) Even with the patch, there is no true odirect behavior since the workaround in the patch doesn't reduce the caching done in kernel's page cache etc.

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


How reproducible:


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Comment 1 Vijay Bellur 2016-05-13 09:54:26 UTC
REVIEW: http://review.gluster.org/14328 (Revert "features/shard: Make o-direct writes work with sharding") posted (#1) for review on master by Krutika Dhananjay (kdhananj)

Comment 2 Vijay Bellur 2016-05-17 11:01:43 UTC
COMMIT: http://review.gluster.org/14328 committed in master by Pranith Kumar Karampuri (pkarampu) 
------
commit 7d67d7d7a6c86a2f42d619c8d21e5e1f44a19b5c
Author: Krutika Dhananjay <kdhananj>
Date:   Fri May 13 15:18:22 2016 +0530

    Revert "features/shard: Make o-direct writes work with sharding"
    
    This reverts commit c272c71391cea9db817f4e7e38cfc25a7cff8bd5.
    
    This is for two reasons:
    1) It introduces high fop latencies
    2) Even with the patch, there is no true odirect behavior since the
       workaround in the patch doesn't reduce the caching done in kernel's
       page cache as far as writes on anon fds associated with individual
       shards is concerned.
    
    Change-Id: Iaf411198b56237ca0601deaf17f69ef178d7e769
    BUG: 1335818
    Signed-off-by: Krutika Dhananjay <kdhananj>
    Reviewed-on: http://review.gluster.org/14328
    Smoke: Gluster Build System <jenkins.com>
    NetBSD-regression: NetBSD Build System <jenkins.org>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu>
    CentOS-regression: Gluster Build System <jenkins.com>

Comment 3 Shyamsundar 2017-03-27 18:11:09 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-3.9.0, please open a new bug report.

glusterfs-3.9.0 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/gluster-users/2016-November/029281.html
[2] https://www.gluster.org/pipermail/gluster-users/


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