Date: Wed, 07 Jan 2009 05:08:09 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-geom@freebsd.org Subject: Re: performance problem with gstripe Message-ID: <gk19r9$p9m$1@ger.gmane.org> In-Reply-To: <CA9F4E99-5819-4FDB-B8F4-8AA21759942B@panasas.com> References: <4AD370A6-2226-442F-BD80-8CFD4045B094@panasas.com> <gk1664$g6d$2@ger.gmane.org> <CA9F4E99-5819-4FDB-B8F4-8AA21759942B@panasas.com>
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[-- Attachment #1 --] Joel Jacobson wrote: > here's what i did: > ca-sbox-2# dd if=/dev/zero of=/dev/stripe/d0 bs=512k count=4096 > 4096+0 records in > 4096+0 records out > 2147483648 bytes transferred in 34.124683 secs (62930508 bytes/sec) > ca-sbox-2# dd if=/dev/zero of=/mnt/bigfile bs=512k count=4096 && > /usr/bin/time sync > 4096+0 records in > 4096+0 records out > 2147483648 bytes transferred in 11.081184 secs (193795502 bytes/sec) Hmm ok, you might be hitting the MAXPHYS problem. Could you try and create your gstripe array with a stripe size of 64 kB and 32 kB and test on those ? [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAklkKqkACgkQldnAQVacBcj43ACg/gelUd4uD5lQofLo+b91Agrm PkgAn0dcO/4spEzgUQCvsdJrKYl1fb8O =/sM+ -----END PGP SIGNATURE-----
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