Bug 1493085

Summary: Sharding sends all application sent fsyncs to the main shard file
Product: Red Hat Gluster Storage Reporter: Krutika Dhananjay <kdhananj>
Component: shardingAssignee: Krutika Dhananjay <kdhananj>
Status: CLOSED ERRATA QA Contact: SATHEESARAN <sasundar>
Severity: high Docs Contact:
Priority: medium    
Version: rhgs-3.3CC: amukherj, bugs, kdhananj, nbalacha, rcyriac, rhinduja, rhs-bugs, sabose, sasundar, sheggodu, storage-qa-internal
Target Milestone: ---Keywords: Triaged
Target Release: RHGS 3.4.0   
Hardware: x86_64   
OS: Linux   
Fixed In Version: glusterfs-3.12.2-13 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 1468483
: 1583462 (view as bug list) Environment:
Last Closed: 2018-09-04 06:36:24 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:
Bug Depends On: 1468483    
Bug Blocks: 1503134, 1523608, 1583462    

Description Krutika Dhananjay 2017-09-19 10:57:02 UTC
+++ This bug was initially created as a clone of Bug #1468483 +++

******* This bug is especially relevant in use cases where we want to use RHV-RHGS HC configuration on single brick plain distribute gluster volumes. ********

Description of problem:

While testing the VM use case with sharding (4 MB shards) enabled, we added additional dht logs to track the fops being sent on fds. Post the test, the logs indicate that most fsyncs from the application are being on the main shard file instead of the shards to which the writes were actually sent.

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

How reproducible:

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Additional info:

Comment 4 Krutika Dhananjay 2018-02-14 07:19:02 UTC
https://review.gluster.org/#/c/19566/1 <--- upstream patch.

Still lot of testing pending. It's a reasonably big change. -2 until I'm done.

Comment 5 Krutika Dhananjay 2018-03-05 09:05:06 UTC
All 4 patches concerning this bz are merged upstream - https://review.gluster.org/#/q/topic:bug-1468483+(status:open+OR+status:merged)

Comment 11 SATHEESARAN 2018-08-23 19:22:16 UTC
Tested with RHGS 3.4.0 nightly build ( glusterfs-3.12.2-16.el7rhgs ) with RHHI environment ( RHV 4.2 ).

1. Created a single brick distribute volume
2. Created a new storage domain with the above created volume
3. Created few VMs with their boot disks on this domain.
4. Installed operating systems on the VM
5. Created more disks for the VM
6. Ran some workload.

No problems found

Comment 13 errata-xmlrpc 2018-09-04 06:36:24 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.