Doug Ledford wrote:
Also, in my reading it was suggested by several researchers the best
performance of an XFS file system is achieved if the stripe width of
the FS
is set to be the same as the RAID array using the su and sw switches in
mkfs.xfs.
This is true of any raid aware file system. I know how to do this for
ext3, but not for xfs, so I won't comment further on that. However, the
stripe size is always chunk size * number of non-parity drives on a
parity based array.
mkfs.xfs will will query the md device for no. of devices and stripe
size and automatically set this optimally (su and sw).
If an array is later grown, these two values will need to be manually
calculated and then be applied as mount options.
Regards,
Richard
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