[OpenAFS] Changing reserved block on ext3 with fs running

Stephan Wonczak a0033@rrz.uni-koeln.de
Thu, 6 Oct 2005 12:29:04 +0200 (MET DST)


On Wed, 5 Oct 2005, Tim Spriggs wrote:

> Isn't there something about needing a small percentage of space to be able
> to keep the ext3/ext2 filesystem from fragmenting too much? Does this
> apply here?

  Not that I know of. Even so, 25 GB on a 500 GB filesystem is a bit
excessive, wouldn't you agree? I had intended to leave 10000 blocks
reserved (makes 40 MB) to give root some breathing room.
  But I still would like a comment from someone knowledgable if it is safe
to change the number of reserved blocks while the fileserver is running.
(Anyone, please ... *whine* :-) )

> Also, is there a problem with running on ext3? I only ask because I know
> openafs can not use journaling filesystems under Solaris.

  ext3 works fine. We have about 10 TB online currently, and we are using
ext3 for about two years without any trouble. IIRC ext3 is a supported FS.
We also used XFS for the vice partitions and this also worked fine.

  I remeber some issues with Solaris UFS, some semantics changes IIRC.
There was a bit of discussion about that a while back, but I don't
remember the details.

	Dipl. Chem. Dr. Stephan Wonczak

        Zentrum fuer Angewandte Informatik (ZAIK)
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