Re: RAID halting

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Leslie Rhorer wrote:

3.  The man page says "When a filesystem is created on a logical volume
device, mkfs.xfs will automatically  query  the  logical  volume  for
appropriate sunit and swidth values."  Does this mean it is best for me to
simply not worry about setting these parameters and let mkfs.xfs do it, or
is there a good reason for me to intervene?

XFS will do exactly that and choose the correct sunit and swidth based upon the RAID stripe size you have chosen - do not worry about it.


5.  Finally, one other thing concerns me a bit.  The researchers I read
suggested XFS has by far the worst file deletion performance of any of the
journaling file systems, and Reiserfs supposedly has the best.  I find that
shocking, since deleting multi-gigabyte files on the existing file system
can take a rather long time - close to a minute.  Small to moderate sized
files get deleted in a flash, but 20GB or 30GB files take forever.  I didn't

Quad core Xeon 2.8GHz md RAID6 of 16 x 750GB. Delete 20GB file:

time rm -f dump

real    0m1.849s
user    0m0.000s
sys     0m1.633s

Regards,

Richard
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