Date: Tue, 30 Dec 2008 19:29:20 -0800 From: Joel Jacobson <jjacobson@panasas.com> To: freebsd-geom@freebsd.org Subject: performance problem with gstripe Message-ID: <4AD370A6-2226-442F-BD80-8CFD4045B094@panasas.com>
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i have a bit of a weird issue, which i suspect is a configuration problem, and was looking for a little advice. i have an LSI JBOD box with a bunch of SAS drives that i would like to gstripe together. each drive individually seems to be able to do about 80 MB/sec streaming write, and doing parallel dd's gives me the 160 MB/sec i would expect. if i gstripe them together with a 256k stripe width, i only see 80 MB/sec, though. if, however, i newfs/mount it as ufs and then dd myself a big file, that gets me about 120-130 MB/sec. why does mounting matter? - j
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