Bug 1558990

Summary:	30% regression on small-file reads from 3.3.1
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	Karan Sandha <ksandha>
Component:	arbiter	Assignee:	Ravishankar N <ravishankar>
Status:	CLOSED ERRATA	QA Contact:	Karan Sandha <ksandha>
Severity:	urgent	Docs Contact:
Priority:	high
Version:	rhgs-3.4	CC:	rhinduja, rhs-bugs, sheggodu, smali, storage-qa-internal
Target Milestone:	---	Keywords:	Regression
Target Release:	RHGS 3.4.0
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	glusterfs-3.12.2-13	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-09-04 06:44:20 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:	1503137

Description Karan Sandha 2018-03-21 13:11:37 UTC

Description of problem:
Regression seen on smallfile reads from rhgs 3.3.1 to rhgs 3.4.0 on fuse mount. 

Version-Release number of selected component (if applicable):
3.12.2-5

How reproducible:
100%
profile infos are kept at sosreports are placed at sosreport and statedumps at mount -t cifs -oguest
//newtssuitcase.lab.eng.blr.redhat.com/newtssuitcase /BZ_sosreports/Karan/Porfile_info/

Steps to Reproduce:
1. Run small-file creates on 6 node setup using 6 client machines below command qeSyncDropCaches.sh; python /small-files/smallfile/smallfile_cli.py --operation read --threads 8 --file-size 64 --files 5000 --top /gluster-mount  --host-set "`echo $CLIENT | tr ' ' ','`"
2. now compare the same with RHGS 3.3.1 i.e 3.8.4.54.3 


Actual results:
Regression seen between release  

Expected results:
No regression should be observed


Additional info:
not a brick mux setup.
The performance numbers weren't consistent i.e after every iterations the regression was more.

Comment 11 Sunil Kumar Acharya 2018-06-27 03:05:48 UTC

Upstream patch: https://review.gluster.org/#/c/20392/

Comment 16 errata-xmlrpc 2018-09-04 06:44:20 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.

https://access.redhat.com/errata/RHSA-2018:2607