From: Mark Fasheh <mark.fasheh@oracle.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [RFC] Integration with external clustering
Date: Tue Oct 18 18:50:43 2005 [thread overview]
Message-ID: <20051018235050.GE25876@ca-server1.us.oracle.com> (raw)
In-Reply-To: <20051018232752.GO11488@ca-server1.us.oracle.com>
On Tue, Oct 18, 2005 at 04:27:52PM -0700, Joel Becker wrote:
> > Membership events (nodes up, down) would be provided to OCFS2
> > post-fencing.
>
> I believe (Mark, correct me if I'm wrong) that OCFS2 merely
> requires the standard "DLM must find out first" protocol. That is, the
> DLM must be able to lock out all locking changes before the filesystem
> tries to recover anything. I believe GFS and even VMS CFS rely on this
> property.
No, it's the other way around - the file system requires notification before
the DLM so that it can mark itself as requiring recovery *before* the DLM
has a chance to start giving away locks that were previously protecting
resources in use by the other node.
You're correct of course that GFS and other cluster file systems require the
same behavior.
--Mark
--
Mark Fasheh
Senior Software Developer, Oracle
mark.fasheh@oracle.com
next prev parent reply other threads:[~2005-10-18 18:50 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-18 16:52 [Ocfs2-devel] [RFC] Integration with external clustering Jeff Mahoney
2005-10-18 17:18 ` Joel Becker
2005-10-18 18:03 ` Lars Marowsky-Bree
2005-10-18 18:27 ` Joel Becker
2005-10-18 18:50 ` Mark Fasheh [this message]
2005-10-19 8:26 ` Lars Marowsky-Bree
2005-10-19 12:49 ` Joel Becker
2005-10-19 17:41 ` Jeff Mahoney
2005-10-20 7:39 ` Lars Marowsky-Bree
2005-10-19 16:30 ` Jeff Mahoney
2005-10-20 5:24 ` Lars Marowsky-Bree
2005-10-20 10:03 ` Joel Becker
2005-10-20 10:25 ` David Teigland
2005-10-20 10:42 ` Joel Becker
2005-10-20 10:45 ` Lars Marowsky-Bree
2005-10-21 4:05 ` Andrew Beekhof
2005-10-24 6:41 ` Lars Marowsky-Bree
2005-10-24 8:39 ` Andrew Beekhof
2005-10-21 4:09 ` Christoph Hellwig
2005-10-21 9:29 ` Robert Wipfel
2005-11-06 23:01 ` Christoph Hellwig
2005-11-07 6:08 ` Lars Marowsky-Bree
2005-10-20 6:04 ` Andrew Beekhof
2005-10-18 18:47 ` Mark Fasheh
2005-10-19 8:35 ` Lars Marowsky-Bree
2005-10-18 18:20 ` Jeff Mahoney
2005-10-19 14:57 ` Lars Marowsky-Bree
2005-10-19 17:42 ` David Teigland
2005-10-20 5:58 ` Lars Marowsky-Bree
2005-10-20 9:45 ` David Teigland
2005-10-28 10:11 ` [Ocfs2-devel] " Lars Marowsky-Bree
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