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re[2]: Clustered XFS?

To: "N. Richard Solis" <nrsolis@xxxxxxx>
Subject: re[2]: Clustered XFS?
From: Greg Freemyer <freemyer@xxxxxxxxxxxxxxxxx>
Date: Thu, 5 Dec 2002 13:53:08 -0500
Cc: <linux-xfs@xxxxxxxxxxx>
Organization: The NorcrossGroup
Sender: linux-xfs-bounce@xxxxxxxxxxx
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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