| To: | Robert Sander <gurubert-dated-1050097897.ckffphdm@xxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: hardware RAID sunit and swidth values? |
| From: | "Martin K. Petersen" <mkp@xxxxxxx> |
| Date: | 11 Apr 2003 18:12:46 -0400 |
| Cc: | linux-xfs@xxxxxxxxxxx |
| In-reply-to: | <news2mail-slrnb9eed1.qm2.gurubert-dated-1050097897.ckffphdm@xxxxxxxxxxxxxxxxxxxxx> |
| Organization: | mkp.net |
| References: | <news2mail-slrnb9cnsc.156.gurubert-dated-1050042067.onpbonhn@xxxxxxxxxxxxxxx cs.epi> <1050072633.16906.1.camel@xxxxxxxxxxx> <1050073584.23735.10.camel@xxxxxxxxxxxxxxxxxxxxxx> <1050075759.16906.48.camel@xxxxxxxxxxx> <20030411162601.GA14523@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <1050081295.16906.70.camel@xxxxxxxxxxx> <news2mail-slrnb9eed1.qm2.gurubert-dated-1050097897.ckffphdm@xxxxxxxxxxxxxxxxxxxxx> |
| Sender: | linux-xfs-bounce@xxxxxxxxxxx |
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>>>>> "Robert" == Robert Sander <ml-linux-xfs@xxxxxxxxxxxxxxx> writes: Robert> That may be the case with software RAID, where mkfs.xfs is Robert> able to get the stripe size from the md driver. But with at Robert> least our hardware RAID boxen sunit and swidth are both set to Robert> 0 (zero). Robert> My only remaining question is: Does this affect performance in Robert> any dramatic way? In general, no. But it depends on the internal workings of your hardware RAID controller. Only way to find out is to experiment with different values and your anticipated I/O load. -- Martin K. Petersen http://mkp.net/ |
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