[SSI] Question about CFS and GFS

[Greg F. <freemyer@NorcrossGroup.com>]

I've just been reading Bruce Walker's excellent article at =
http://foundries.sourceforge.net/clusters/index.pl

One question I had was that when he describes the Cluster File System, he talks =
about GFS as a standalone FS, and of CFS being layered over other Filesystems =
like ext3.

No mention was made of layering CFS over GFS. =20

I hope that CFS will indeed layer over GFS.

=3D=3D=3D=3D
I'm most familiar with Compaq's Tru64 CFS, and with it they effectively do =
that.  (Different technologies, but similar concept.)

That eliminates a SPOF for a node, and also allows a mixture of nodes with =
direct connection to the storage and those without.

i.e. SPOF, if a node has one FC connection to a backend SAN, and that FC cable =
gets cut, the node can continue to operate by sending its disk i/o to a node =
that still has an operational FC connection.


Greg Freemyer
Internet Engineer
Deployment and Integration Specialist
The Norcross Group
www.NorcrossGroup.com