Many thanks to the following people -
Jefferey Hummel Jeffrey_Hummel_at_albemarle.com
Kathee kathee_at_mindiq.com
Scott Fafrak scott.fafrak_at_bruden.com
Brad Nichols brad.nichols_at_compaq.com
Chia-Jen Chyan chyan_at_decatl.alf.dec.com
The answer is "YES". I include a brief summary below -
Yes, cluster_root, cluster_usr and cluster_var have no special advfs
restrictions - unlike a root_domain in a standalone system which must
be the 'a' partition and cannot have multiple volumes (no addvol or
rmvol). So yes you can add a volume then remove the original volume
the same as any other advfs domain - but on that note - expect that
the rmvol will fail if their is not enough remaining space for the
currently defined files. I wouldn't do it under load if I didn't have
to (wait for off hours.)
On the other hand, the more complex you make the data definition for
the file systems the more error prone and/or hard to restore
they become - i.e. having 20 tiny volumes as your
cluster_root~! . So the suggestion is keep it simple and wait
for performance to be a measurable problem before going to far.
Tks & Rgds,
Alay Shah
Allegiance Healthcare Corporation
1400 Waukegan Rd.
McGaw Park, IL 60085
Ph - 847-578-2584
Fax - 847-578-5586
Email - unixadmin_at_allegiance.net
shahal_at_allegiance.net
----------------------ORIGINAL
QUESTION------------------------------------
When I created our V5.1 cluster, I put all three domains on different
slices of the same mirror set. Here's the disklabel from that disk
a: 1048576 0 AdvFS # b:
1039373 1048576 unused 0 0 # c:
35556389 0 unused 0 0 # d:
4096 2087949 unused 0 0 # e: 0
0 unused 0 0 # f: 0
0 unused 0 0 # g: 16732172 2092045
AdvFS # h: 16732172 18824217 AdvFS
#
where a is cluster_root, g is cluster_usr and h is cluster_var. But
now I am concerned about performance because I will have 6 cluster
members in this cluster eventually trying to hit /var/tmp on the same
cluster_var. Also, lots of our applications put data out in /usr/opt
which is in /usr. Also my /usr filesystem is already at 55% full. What
I should have really done is created raidsets(RAID 3/5) and put /,
/usr and /var on their own raidsets. In any case, I know that we can
bump up the storage by adding volumes using addvol. But can I remove
the old disk using rmvol? What I would like to do is add the new raid
sets and remove the old disk partitions that I initially defined. Any
comments/suggestions/information will be greatly appreciated.
Tks & Rgds,
Alay Shah
Allegiance Healthcare Corporation
1400 Waukegan Rd.
McGaw Park, IL 60085
Ph - 847-578-2584
Fax - 847-578-5586
Email - unixadmin_at_allegiance.net
shahal_at_allegiance.net
Received on Tue May 29 2001 - 17:38:52 NZST