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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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigD0A0E3736B77A97D761DA11B Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Joel Jacobson wrote: > here's what i did: > ca-sbox-2# dd if=3D/dev/zero of=3D/dev/stripe/d0 bs=3D512k count=3D4096= > 4096+0 records in > 4096+0 records out > 2147483648 bytes transferred in 34.124683 secs (62930508 bytes/sec) > ca-sbox-2# dd if=3D/dev/zero of=3D/mnt/bigfile bs=3D512k count=3D4096 &= & > /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 ? --------------enigD0A0E3736B77A97D761DA11B Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----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----- --------------enigD0A0E3736B77A97D761DA11B--
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