Bug 1414080

Summary: [Disperse] IO pauses for few seconds while creating and writing files on mount point.
Product: [Community] GlusterFS Reporter: Ashish Pandey <aspandey>
Component: disperseAssignee: Ashish Pandey <aspandey>
Status: CLOSED WORKSFORME QA Contact:
Severity: medium Docs Contact:
Priority: low    
Version: mainlineCC: aspandey, bugs, jahernan, pkarampu
Target Milestone: ---Keywords: Triaged
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Last Closed: 2018-10-17 09:33:37 UTC Type: Bug
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Description Ashish Pandey 2017-01-17 17:12:26 UTC 
Description of problem:

IO pauses for few seconds while creating and writing files on mount point. 
This pause can be observed for 1 sec to 5 secs.

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


How reproducible:
100%

Steps to Reproduce:
1. Create 4+2 ec volume 
2. mount and start creating and writing of files on mount point
for i in {1..10000}; do dd if=/dev/zero of=file-1-$i count=1 bs=1M; done


Actual results:

IO seems to pause for few seconds.

Expected results:
There should not be any pause. 

Additional info:


[root@apandey /]# gluster --version
glusterfs 3.10dev
Repository revision: git://git.gluster.org/glusterfs.git
Copyright (c) 2006-2016 Red Hat, Inc. <https://www.gluster.org/>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
It is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3
or later), or the GNU General Public License, version 2 (GPLv2),
in all cases as published by the Free Software Foundation.
[root@apandey /]#
Comment 1 Pranith Kumar K 2017-01-23 14:43:13 UTC 
Do you have any theory as to why this happens? Profile info would help.
Comment 2 Ashish Pandey 2018-10-17 09:33:37 UTC 
Not seeing this for last few releases. Closing this bug now.