On Sat, Apr 25, 2009 at 12:25 AM, Richard Scobie <richard@xxxxxxxxxxx> wrote: > 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). It will, but need dmsetup installed. > > If an array is later grown, these two values will need to be manually > calculated and then be applied as mount options. > > Regards, > > Richard > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- -- Best regards, [COOLCOLD-RIPN] -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
