Bug 1169764

Summary:	RDMA: iozone fails with fwrite: Input/output error when write-behind translator is enabled
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	Mohammed Rafi KC <rkavunga>
Component:	rdma	Assignee:	Mohammed Rafi KC <rkavunga>
Status:	CLOSED ERRATA	QA Contact:	Ben Turner <bturner>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	rhgs-3.0	CC:	aavati, asrivast, nlevinki, nsathyan, rcyriac, rgowdapp, rkavunga, rwheeler, sharne, surs, vagarwal
Target Milestone:	---	Keywords:	ZStream
Target Release:	RHGS 3.0.3
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	glusterfs-3.6.0.37-1	Doc Type:	Bug Fix
Doc Text:	Previously, for socket writev, all the buffers are aggregated and received at the remote end as one payload. So there is only one buffer needed to hold the data. But for rdma, the remote endpoint will read the data from client buffer as one by one. So there was no place for holding the data starting from second buffer.	Story Points:	---
Clone Of:
Clones:	1171142 (view as bug list)		Environment:
Last Closed:	2015-01-15 13:43:05 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:	1162694, 1171142

Description Mohammed Rafi KC 2014-12-02 12:10:34 UTC

Description of problem:

Iozone fails for rdma type volumes if write-behind translator is enabled. After writing one block size it calls for flush . Probably it could be wrong synchronization between writev and flush.

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

rhs-3.0.3

How reproducible:

Very often

Steps to Reproduce:
1.create a 1*1 rdma type volume.
2.start the volume
3.mount the volume
4.run iozone -a 2>&1 1>>/home/iozone.log 1>>/tmp/iozone

Actual results:

fwrite: Input/output error

Expected results:

should pass

Additional info:

it will pass if we disable write-behind translator.

Comment 3 Raghavendra G 2014-12-08 09:33:24 UTC

https://code.engineering.redhat.com/gerrit/#/c/38011/

Comment 4 Ben Turner 2015-01-05 15:20:58 UTC

Verified on glusterfs-3.6.0.37-1.

Comment 5 Shalaka 2015-01-09 10:06:45 UTC

Rafi,

Please review and sign-off edited doc text.

Comment 6 Mohammed Rafi KC 2015-01-09 10:09:04 UTC

looks good.

Comment 8 errata-xmlrpc 2015-01-15 13:43:05 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://rhn.redhat.com/errata/RHBA-2015-0038.html