[536] in Info-AFS_Redistribution
Re: rs_aix31 server hints?
daemon@ATHENA.MIT.EDU (Dawn Stokes)
Thu Jan 16 18:57:24 1992
Date: Thu, 16 Jan 92 16:36:51 CST
From: dstokes@dce.austin.ibm.com (Dawn Stokes)
To: paw@rigel.dartmouth.edu
Cc: info-afs@transarc.com
Pat,
I have been running a RS/6000 based cell for quite some time with
large amounts of disk space. One of my servers has about 3.5Gb of
disk space. For the most part, I have stuck to the standard setup.
One /vice* per disk drive, and multiple filesets per vice partition.
However when I originally set up the system, I was careful to leave
a little bit of unused space on several of the drives. Where this
has really saved me is the situation that because of unexpected
increases in space usage, and the cache manager's problem of not
being able to control its cache size as well as it should, a partition
has filled up.
In this situation, my volumes went offline, and salvager could not
even run to bring them back online because it had no disk space to
work with. By going in and using lvm to extend them vice partition
be 5M or so, I was able to bring the data back online. At that point,
I (of course) adjusted some volume quotas, etc to prevent this from
happening again. It definitely save me that time though!
The other situation where the lvm can really help is when you have
disk drives of only 350M or so, but need volumes which are larger
(say 700M). We hit this frequently because we store builds in AFS,
and when all of DCE plus docs are built, some with debug on, the
builds can get quite large, quite fast. Storing pieces of the build
in seperate volumes isn't really an option since we want the build
coordinator to have to interact with AFS as little as possible. I
don't know if you would ever hit this type of thing in your environment.
Anyway, for what its worth, there is a little info. I haven't found
a need to have logical volumes span disk drive except in unusual
situations such as these. For the most part, the volume management
commands have given enough flexibility that I have been able to stick
to my original partition setup.
Dawn
