From: Chris Bryant (Christopher.Bryant@DTAG.Com)
Date: Mon Jan 27 2003 - 14:35:47 EST
Thanks to Dr. Thomas Blinn and Jim Fitzmaurice for their responses. Basicly
CFS works on top of your exsiting file domains so no converstion will be
required. Thanks again.
Dr. Blinn:
The magic in the TruCluster software that makes file systems sharable in a
cluster is "CFS" which is the cluster file system layer. For it to work the
"native" file systems have to have supporting "hooks", and in V5.1, the ONLY
"native" file system that had supporting hooks was AdvFS. I'm not sure this
answers your question, but basically, you don't have to do much of anything
to your existing file systems to make them work in a TruCluster, beyond
making sure they are accessible (ideally making them be present on shared
storage). In fact, as you build the cluster, you usually start with one
stand-alone system, make it into a single-member cluster (which involves
creating a cluster root and /usr and /var file systems, a member boot disk,
and the like), and when you reboot it, all of its "data" file systems are
just visible unless you go out of your way to hide them (e.g., remove them
from the fstab, get rid of their entries under /etc/fdmns, etc.) but you
will have to take some manual steps to make the "data" file systems from the
second member visible in the new cluster (since that member's mass storage
devices will all get new names in the new cluster).
Hope this helps..
Jim Fitzmaurice:
I think you may be a little confused. CFS is just another layer over AdvFS.
Your normal AdvFS file systems are shared across the cluster using CFS.
There is no conversion required. I started with three servers, one was the
NFS server, the other two clients, until I clustered them. Same file
systems, same filesets, same domains, the only thing that changed was file
access times. A little faster over the memory channel.
Jim Fitzmaurice
jpfitz@fnal.gov
-----Original Message-----
From: Chris Bryant
Sent: Monday, January 27, 2003 1:16 PM
To: Tru64 Unix (tru64-unix-managers@ornl.gov)
Subject: CORRECTION: CFS and AdvFS
Admins,
We currently have 2 stand-alone GS140's running 5.1 UNIX on a SAN's.
We are in the planning stages of clustering these 2 servers together. My
question is this, can we have advfs file domains be shared in a cluster or
do they have to be CFS? I will summarize.
TIA,
Chris Bryant
Unix Administrator
Dollar Thrifty Automotive Group
-----Original Message-----
From: Chris Bryant
Sent: Monday, January 27, 2003 1:15 PM
To: Tru64 Unix (tru64-unix-managers@ornl.gov)
Subject: CFS and AdvFS
Admins,
We currently have 2 stand-alone GS140's running 5.1 UNIX on a SAN's.
We are in the planning stages of clustering these 2 servers together. My
question is this, can we have advfs file domains be shared in a cluster or
do they have to be advfs file domains? I will summarize.
TIA,
Chris Bryant
Unix Administrator
Dollar Thrifty Automotive Group
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