Bug 1289465

Summary:	Disable server-side quorum for virt-store usecase
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	SATHEESARAN <sasundar>
Component:	core	Assignee:	Ravishankar N <ravishankar>
Status:	CLOSED WONTFIX	QA Contact:	SATHEESARAN <sasundar>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rhgs-3.1	CC:	pkarampu, ravishankar, rhs-bugs, sabose, storage-qa-internal
Target Milestone:	---	Keywords:	ZStream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:	RHEV-RHGS Integration
Last Closed:	2016-02-01 11:29:37 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:	1277939

Description SATHEESARAN 2015-12-08 08:32:57 UTC

Description of problem:
-----------------------
'virt' group file which contains the volume options for optimizing volume for virt-store usecase, includes server side quorum.

Server-side quorum is not fool-proof for preventing split-brain in the volume

Version-Release number of selected component (if applicable):
-------------------------------------------------------------
RHGS 3.1

How reproducible:
-----------------
NA

Steps to Reproduce:
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1. cat /var/lib/glusterd/groups/virt

Actual results:
---------------
server-side quorum is enabled in virt group file

Expected results:
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server-side quorum should be disabled

Additional info:
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By default, server-side quorum is turned off, and so its simple to remove the entry "server-quorum-type=server" from virt group file

Comment 3 Ravishankar N 2016-01-12 11:17:26 UTC

Apparently GSS are finding that for replica 2 set-up, adding a dummy node and enabling server quorum is reducing the probability of files ending up in split-brain. So it might be better to retain this option for now. Once arbiter volumes are made available for downstream, it might make sense to remove this option.

Comment 4 Ravishankar N 2016-02-01 11:29:37 UTC

Closing this bug since there is no consensus on the future of server-quorum as of today. If a firm decision can be arrived at for disabling it or even removing it altogether, the bug can be reconsidered.