[Ocfs2-users] file locking in OCFS2

[Mark Fasheh]

On Tue, Sep 21, 2004 at 06:10:56PM +0200, ocfs2 at asset-control.com wrote:
> 
> Greetings,
> We want to experiment with a small cluster with OCFS2 and are trying to find
> out if OCFS2 supports all the file operation functionallity that we need.
> When it says on the OCSF2 project home page that the new features include POSIX
> compliance,
> what does this exactly mean.
Well, basically it means we pass the LTP posix tests for a local file system
(single node basically).

> More specifically, would concurrent fcntl( ... F_SETLKW ...) calls on OCFS2
> files from different
> cluster nodes work as in NFS?
Not yet, though it's on our feature list for post 1.0.

> If not, is there an alternate API and documentation?
> Quick inspection of the OCFS2 source tree suggests there is at least a
> distributed lock manager
> involved.
> Does it have an API and would it be possible to use it to create locks on
> 'virtual files'?
No, we don't export the lock manager api to userspace :)
	--Mark

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--
Mark Fasheh
Software Developer, Oracle Corp
mark.fasheh at oracle.com