Re: readahead (blockdev --setra) with sw raid(5)?

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On Sat, 27 Nov 2004, David Greaves wrote:

I routinely use --setra 4096 on the underlying devices, the md array devices and the lvm devices
I am generally reading 1-2 gigabyte files.


I use XFS and it is often suggested as a good fs (though I think there may be some XFS/nfs issues with 2.6 at the moment - see lkml)


ok i'll try 4096 then on my devices (why did you choose 4096 and not 2048 (or 8192 (or bigger?)

also i think i'll create my new raid5 with xfs
are there any special tuning options i can use with xfs ? (like stride with ext3)


i think i'll go with 256 stripe size (not sure if i want to go 512)
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