From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id p0P6Iwk9201315 for ; Tue, 25 Jan 2011 00:18:58 -0600 Received: from mailsrv14.zmi.at (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7B4698AA2F5 for ; Mon, 24 Jan 2011 22:21:18 -0800 (PST) Received: from mailsrv14.zmi.at (mailsrv1.zmi.at [212.69.164.54]) by cuda.sgi.com with ESMTP id 31RFdW9nQDNOGvBv for ; Mon, 24 Jan 2011 22:21:18 -0800 (PST) From: Michael Monnerie Subject: Re: extremely slow write performance plaintext Date: Tue, 25 Jan 2011 07:21:09 +0100 References: <3205_1294953756_4D2F6D1C_3205_1943_1_4D2F6D1C.2060409@davisvision.com> <4D30C7F3.3040105@hardwarefreak.com> <1779_1295360207_4D35A0CF_1779_747_1_4D35A0CF.9050503@davisvision.com> In-Reply-To: <1779_1295360207_4D35A0CF_1779_747_1_4D35A0CF.9050503@davisvision.com> MIME-Version: 1.0 Message-Id: <201101250721.14716@zmi.at> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5875782278610784779==" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Cc: Cory Coager , Stan Hoeppner --===============5875782278610784779== Content-Type: multipart/signed; boundary="nextPart2800498.z8KdFmrLEf"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit --nextPart2800498.z8KdFmrLEf Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On Dienstag, 18. Januar 2011 Cory Coager wrote: > Also, I want to stress that I am only having performance issues with > one logical volume, the others seem fine. You're getting 40MB/s write speed and says that's fine? I get more=20 performance from a single SATA desktop drive. Your setup seems to suck=20 extremely somewhere. It already starts with your dd speed. I started it on a virtualized VM=20 on an old, overloaded server and get: # dd if=3D/dev/zero of=3Dtest.dd bs=3D1k count=3D1M 1048576+0 Datens=E4tze ein 1048576+0 Datens=E4tze aus 1073741824 Bytes (1,1 GB) kopiert, 10,9992 s, 97,6 MB/s This is a hardware RAID 6 with just 8x 10krpm WD SATA drives. Try to=20 look into general I/O problems. Maybe you can try to boot from an actual=20 linux CD with kernel >2.6.30 to see if that helps performance. Maybe one or more disks in your array are dead and the controller is=20 crying for replacement? =2D-=20 mit freundlichen Gr=FCssen, Michael Monnerie, Ing. BSc it-management Internet Services: Prot=E9ger http://proteger.at [gesprochen: Prot-e-schee] Tel: +43 660 / 415 6531 // ****** Radiointerview zum Thema Spam ****** // http://www.it-podcast.at/archiv.html#podcast-100716 //=20 // Haus zu verkaufen: http://zmi.at/langegg/ --nextPart2800498.z8KdFmrLEf Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (GNU/Linux) iEYEABECAAYFAk0+a9oACgkQzhSR9xwSCbSMLwCgq2/V3O81NfYnOnUhlmdd9E/P a4AAoKp/QzcB/KbtDN1VgHx0QPAffdX2 =aX+8 -----END PGP SIGNATURE----- --nextPart2800498.z8KdFmrLEf-- --===============5875782278610784779== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs --===============5875782278610784779==--