Bug 591567 – [RFE] Support cluster-wide leases on files in gfs2

Bug 591567 - [RFE] Support cluster-wide leases on files in gfs2

Summary:	[RFE] Support cluster-wide leases on files in gfs2

Status:	NEW

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	kernel (Show other bugs)
Sub Component:
Version:	rawhide
Hardware:	All Linux

Priority	low Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Steve Whitehouse
QA Contact:	Fedora Extras Quality Assurance
Docs Contact:

URL:
Whiteboard:
Keywords:	FutureFeature

Depends On:
Blocks:	812133
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Reported:	2010-05-12 10:58 EDT by Simo Sorce
Modified:	2014-06-18 04:04 EDT (History)
CC List:	12 users (show)

See Also:
Fixed In Version:
Doc Type:	Enhancement
Doc Text:
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Old rhel4 patches to implement cluster-leases (6.43 KB, application/x-gzip) 2010-05-14 19:33 EDT, Abhijith Das	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

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Description Simo Sorce 2010-05-12 10:58:45 EDT

In order to be able to server files over multiple protocols like SMB(2) / NFSv4, on active/active clusters (using CTDB for example), it is necessary to have support for cluster wide leases so that oplocks/delegations can be granted to clients.

Without gfs2 support you can't correctly grant oplocks/delegations to clients without risking file corruption.

Comment 2 Abhijith Das 2010-05-14 19:33:32 EDT

Created attachment 414191 [details]
Old rhel4 patches to implement cluster-leases

I wrote this patchset for rhel4 gfs way back in 2006. I'm just posting it here so we can borrow ideas from it if necessary. From what I remember about this, there were multiple glocks per inode to be held during open/close and this introduced a fair amount of overhead. We shelved the patchset due to this overhead and also because not many people (except samba) were wanting to use it.

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