I think they were planning on using that DLM from IBM to replace their own
lock server implementation. From what I can gather, IBM isn't puting any
resources into that DLM project so I'm not sure where it stands.
My only experience with Clustered Filesystems is with GFS. I guess what I'm
trying to say is it worth exploring the possibility of adding some of those
clustering features to Linux XFS? Using the OpenGFS code, the project could
stay "open". Of course, not being a filesystem coding expert, I'm not the
right person to judge the effort required. I was trying to see if anyone
had thought about doing it or something similar.
-----Original Message-----
From: Greg Freemyer [mailto:freemyer@xxxxxxxxxxxxxxxxx]
Sent: Thursday, December 05, 2002 1:53 PM
To: N. Richard Solis
Cc: linux-xfs@xxxxxxxxxxx
Subject: re[2]: Clustered XFS?
I don't know cxfs, but it sounds like the Tru64 clustered filesystem, not
like NFS.
i.e.
Access to data is distributed to all cluster members.
Access to Meta-Data / Locking is handled by one node in the cluster.
GFS/OpenGFS also fully distributes the meta-data updates, but relies on an
external lock server. :(
Greg
>> Sounds more like a Clustered NFS solution to me? Would I be on target
>> with
>> that one?
>> -----Original Message-----
>> From: Craig Tierney [mailto:ctierney@xxxxxxxx]
>> Sent: Thursday, December 05, 2002 12:41 PM
>> To: N. Richard Solis
>> Cc: 'Ray Muno '; 'Steve Lord '; linux-xfs@xxxxxxxxxxx
>> Subject: Re: Clustered XFS?
>> The client provides the interface so that when a user does a read
>> or write, it translates the commands. The server takes care of the
layout
>> and locking (if supported). Right now you can have a linux box access
>> the shared filesystem, but you still need an Irix box to take care of
>> the metadata and locking.
>> I have not worked with CXFS, so I might have exact terminology wrong
>> but I think I have the idea right.
>> Craig
>> On Thu, Dec 05, 2002 at 12:22:31PM -0500, N. Richard Solis wrote:
>> > Client? Server? Please correct me if I'm wrong but should there be
a
>> > distinction? My understanding of CXFS was that there were
enhancements
>> made
>> > to XFS to cupport concurrent access to a storage pool via a SAN. To
do
>> > this, you'd need locking/recovery, and some way to ensure that
metadata
>> > changes were visible to all the servers that had the same filesystem
>> > mounted. Where does a client fit into all of this?
>> >
>> >
>> > -----Original Message-----
>> > From: linux-xfs-bounce@xxxxxxxxxxx
>> > [mailto:linux-xfs-bounce@xxxxxxxxxxx]On Behalf Of Tierney, Craig
>> > Sent: Thursday, December 05, 2002 11:59 AM
>> > To: 'Ray Muno '; 'Steve Lord '
>> > Cc: 'N. Richard Solis '; 'linux-xfs@xxxxxxxxxxx '
>> > Subject: RE: Clustered XFS?
>> >
>> >
>> >
>> > SGI demoed the linux client at SC2002. The server though is still
not
>> > ready. I think the person I talked to said 'in 6 months' but I could
>> > be off there.
>> >
>> > Craig
>> > -----Original Message-----
>> > From: Ray Muno
>> > To: Steve Lord
>> > Cc: N. Richard Solis; linux-xfs@xxxxxxxxxxx
>> > Sent: 12/5/02 12:13 PM
>> > Subject: Re: Clustered XFS?
>> >
>> > The promise of a Linux client has been out there as long as CXFS has
>> > been
>> > around as far as I recall. When is it going to materialize?
>> >
>> > It has seemed strange to me that SGI can Support Solaris and Windows
NT
>> > with this environment but Linux support has never been made
available.
>> >
>> >
>> > On Thu, Dec 05, 2002 at 10:50:47AM -0600, Steve Lord wrote:
>> > > On Thu, 2002-12-05 at 10:43, N. Richard Solis wrote:
>> > > > Is anyone working on adding clustering/SAN support to XFS on
Linux?
>> > > >
>> > > > I was looking at the GFS software from Sistina and the OpenGFS
>> > project. I'm
>> > > > wondering if it's possible to merge the codebases of XFS and
OpenGFS
>> > to
>> > > > provide the clustering functionality on XFS. Am I crazy?
>> > >
>> > > Go look for CXFS on SGI's home page. There will be something
available
>> > > for Linux, but it will not be open source, and what parts of it are
>> > > available for hardware other than SGI's is under discussion.
>> > >
>> > > Steve
>> > >
>> > > --
>> > >
>> > > Steve Lord voice:
+1-651-683-3511
>> > > Principal Engineer, Filesystem Software email: lord@xxxxxxx
>> > >
>> >
========================================================================
>> > =====
>> >
>> > Ray Muno
>> > http://www.aem.umn.edu/people/staff/muno
>> > University of Minnesota e-mail:
>> > muno@xxxxxxxxxxx
>> > Aerospace Engineering and Mechanics Phone: (612)
>> > 625-9531
>> > 110 Union St. S.E. FAX: (612)
>> > 626-1558
>> > Minneapolis, Mn 55455
>> >
>> >
========================================================================
>> > =====
>> >
>> >
>> >
>> >
>> >
>> >
>> > [[HTML alternate version deleted]]
>> >
>> >
>> >
>> >
>> >
>> --
>> Craig Tierney (ctierney@xxxxxxxx)
Greg Freemyer
Internet Engineer
Deployment and Integration Specialist
Compaq ASE - Tru64 v4, v5
Compaq Master ASE - SAN Architect
The Norcross Group
www.NorcrossGroup.com
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