Date: Mon, 31 Mar 2008 19:36:56 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-current@freebsd.org Subject: Are large RAID stripe sizes useful with FreeBSD? Message-ID: <fsr7fb$hl0$1@ger.gmane.org>
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Most of new hardware RAID controllers offer stripe sizes of 128K, 256K and some also have 512K and 1M stripes. In the simplest case of RAID0 of two drives, knowing that the data is striped across the drives and that FreeBSD issues IO request of at most 64K, is it useful to set stripe sizes to anything larger than 32K? I suppose something like TCQ would help the situation but does anyone know how is this situation usually handled on the RAID controllers?
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