Bug 591567 - [RFE] Support cluster-wide leases on files in gfs2
[RFE] Support cluster-wide leases on files in gfs2
Status: NEW
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
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All Linux
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Assigned To: Steve Whitehouse
Fedora Extras Quality Assurance
: 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)
12 users (show)

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Doc Type: Enhancement
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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
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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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