From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o438qY3l144246 for ; Mon, 3 May 2010 03:52:34 -0500 Received: from mailsrv14.zmi.at (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0BAE5307659 for ; Mon, 3 May 2010 01:54:40 -0700 (PDT) Received: from mailsrv14.zmi.at (mailsrv1.zmi.at [212.69.164.54]) by cuda.sgi.com with ESMTP id LHv1InRhONA9ZgBO for ; Mon, 03 May 2010 01:54:40 -0700 (PDT) Received: from mailsrv.i.zmi.at (h081217106033.dyn.cm.kabsi.at [81.217.106.33]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "mailsrv2.i.zmi.at", Issuer "power4u.zmi.at" (not verified)) by mailsrv14.zmi.at (Postfix) with ESMTPSA id B6B0A800183 for ; Mon, 3 May 2010 10:54:39 +0200 (CEST) Received: from saturn.localnet (saturn.i.zmi.at [10.72.27.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mailsrv.i.zmi.at (Postfix) with ESMTPSA id 603CB83C823 for ; Mon, 3 May 2010 10:54:39 +0200 (CEST) From: Michael Monnerie Subject: read slower than write on "mv"? Date: Mon, 3 May 2010 10:54:28 +0200 MIME-Version: 1.0 Message-Id: <201005031054.38817@zmi.at> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============4658729543072289956==" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com --===============4658729543072289956== Content-Type: multipart/signed; boundary="nextPart1632245.G5Q5NsuaWY"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit --nextPart1632245.G5Q5NsuaWY Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable This is not XFS specific, I see it on every filesys. I do a=20 "mv . /newlocation" and see this with iostat: Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq- sz avgqu-sz await svctm %util xvdb 608,60 2,60 25967,20 102,40 85,31 5,37 =20 8,77 1,58 96,72 xvdg 0,00 608,60 0,00 26532,10 87,19 7,55 =20 12,41 0,12 7,44 Reading takes 97% I/O time, writing 7%. This is on the same raidset, but=20 I see the same when copying between two different single disks also. Or=20 is it just an effect of write caching that writes look faster than=20 reads? =2D-=20 mit freundlichen Gr=C3=BCssen, Michael Monnerie, Ing. BSc it-management Internet Services http://proteger.at [gesprochen: Prot-e-schee] Tel: 0660 / 415 65 31 // Wir haben im Moment zwei H=C3=A4user zu verkaufen: // http://zmi.at/langegg/ // http://zmi.at/haus2009/ --nextPart1632245.G5Q5NsuaWY Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) iEYEABECAAYFAkvej04ACgkQzhSR9xwSCbQgCQCgoJg7TW1o4nZ30FAtCjjFyBht 064AoPOsBCaeZxeUjB2J+Mlsgi0J7nhp =YbG2 -----END PGP SIGNATURE----- --nextPart1632245.G5Q5NsuaWY-- --===============4658729543072289956== 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 --===============4658729543072289956==--