Hello Bryan,
On Thu, 20 Oct 2011, Bryan J Smith wrote:
Vincent --
Thanx for your testing. I wish I had a test system at the client, but I
do not (long story, and none of which I can share). You're saving me a
lot of time. If I can do anything for you in the future, don't hesitate
to ask.
Thanks. BTW, It's easy to build a test system: there is a free download
for SHFA which a 60-day evaluation licence.
Sounds like we don't want the risk at this point.
Good practice.
Last night I toyed with an alternative migration procedure to VxFS using
the new storage, instead of trying to resize Ext3. Long story short,
the services/processes can be discretely SIGHUP'd or restarted, so we
could change the disk access to another mount. Once that is done, we
can recycle the existing subdisk, containing the plex/volume with Ext3,
as part of the new plex/volume, with VxFS.
You don't need to do that SIGHUP stuff. 'hastop -all -force' will stop the
Cluster -without- stopping the apps. It's exactlty what's it's done for.
1) run 'hastop -all -force' on one node. VCS will stop monitoring its
resources and exit on all nodes (port 'h' will disappear from 'gabconfig -a').
2) Modify your filesystems at your convencience. Edit
/etc/VRTSvcs/conf/config/main.cf accordingly or step 3) will hurt (ouch).
3) run 'hastart' on each node, port 'h' will re-appear and the Cluster
will re-probe its resources and find them again.
I think this is going to be the best option going forward, for a completely
on-line solution.
Yes, I can confirm that VxVM+VxFS is the best choice if you use VCS.
Thank you everyone for your information, and even more so for any
testing. I'm constrained in my access and options at my client. If it
was all RHCS, CLVM, etc... I could give solid answers. But the Veritas
aspect of the stack, when I can't test, is a limiting detail for myself.
Thanx again for testing Vertias 5.1 on RHEL5.7 for me Vincent. I owe you a big
one there. Didn't expect such complete assistance.
No problem at all, I'm not a veritas specialist but I've been using use
their product(s) on Linux (and Solaris also) for a long time.. Please feel
free to ask off-list if you have other questions,
Best regards,
--
,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,
Vincent S. Cojot, Computer Engineering. STEP project. _.,-*~'`^`'~*-,._.,-*~
Ecole Polytechnique de Montreal, Comite Micro-Informatique. _.,-*~'`^`'~*-,.
Linux Xview/OpenLook resources page _.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'
http://step.polymtl.ca/~coyote _.,-*~'`^`'~*-,._ coy...@nospam4cojot.name
They cannot scare me with their empty spaces
Between stars - on stars where no human race is
I have it in me so much nearer home
To scare myself with my own desert places. - Robert Frost
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