Re: Fastest Chunk Size w/XFS For MD Software RAID = 1024k

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On Mon, 2 Jul 2007, Mr. James W. Laferriere wrote:

	Hello Justin (& all) ,


My read ahead is set to 64 megabytes and 16384 for the stripe_size_cache.

Might you know of a tool for acquiring these (*) parameters for a scsi drive ? hdrarm really doesn't like real scsi drives so that doesn't seem to work for me .

(*)	"BuffType=DualPortCache, BuffSize=7936kB,"  Stolen from above .


		Tia ,  JimL

Best bet is to benchmark and test, try 128,256,512,1024 for the chunk size, also if your drives are on the PCI bus, it probably won't matter much.

Justin.
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