Bug 1558995 – 30% regression on small-file rmdirs from 3.3.1

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Bug 1558995 - 30% regression on small-file rmdirs from 3.3.1

Summary:	30% regression on small-file rmdirs from 3.3.1

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Gluster Storage
Classification:	Red Hat
Component:	arbiter (Show other bugs)
Sub Component:
Version:	3.4
Hardware:	All Linux

Priority	high Severity high
Target Milestone:	---
Target Release:	RHGS 3.4.0
Assigned To:	Ravishankar N
QA Contact:	Karan Sandha
Docs Contact:

URL:
Whiteboard:
Keywords:	Regression

Depends On:
Blocks:	1369312 1503137
	Show dependency tree / graph

Reported:	2018-03-21 09:24 EDT by Karan Sandha
Modified:	2018-09-24 02:51 EDT (History)
CC List:	7 users (show)

See Also:
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 02:44:20 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:2607	None	None	None	2018-09-04 02:45 EDT

Groups: None (edit)

Description Karan Sandha 2018-03-21 09:24:14 EDT

Description of problem:
Regression seen on smallfile rmdir 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 rmdir on 6 node setup using 6 client machines below command qeSyncDropCaches.sh; python /small-files/smallfile/smallfile_cli.py --operation rmdir --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. 
regression seen on 2x2 volume also

Comment 8 Raghavendra G 2018-04-16 02:02:27 EDT

Karan,

Was this seen on plain distribute volumes too? There are some changes to mkdir/rmdir/renamedir codepaths in DHT during 3.4.0 cycle. Hence asking to clarify whether this regression was introduced due to any of these changes.

regards,
Raghavendra

Comment 13 Sunil Kumar Acharya 2018-06-26 23:05:59 EDT

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

Comment 18 errata-xmlrpc 2018-09-04 02:44:20 EDT

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

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