From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id mA94TGxb020282 for ; Sat, 8 Nov 2008 23:29:16 -0500 Received: from mail.knebb.de (mail.knebb.de [83.137.99.149]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id mA94T2QT004053 for ; Sat, 8 Nov 2008 23:29:02 -0500 Received: from tp.knebb.de (p54BC4A50.dip.t-dialin.net [84.188.74.80]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mail.knebb.de (Postfix) with ESMTP id 46DDD1190A for ; Sun, 9 Nov 2008 05:29:01 +0100 (CET) Message-ID: <4916670C.4020502@knebb.de> Date: Sun, 09 Nov 2008 05:29:00 +0100 From: =?ISO-8859-1?Q?Christian_V=F6lker?= MIME-Version: 1.0 Subject: Re: [linux-lvm] pvmove and 100% IO Wait References: <4915F80E.40407@knebb.de> <4915FB94.1070005@knebb.de> In-Reply-To: Content-Transfer-Encoding: 7bit Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii" To: LVM general discussion and development -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Yohoo! > Might not be, but if an operation involves multiple disks it will > probably go at the pace of the slowest disk, which for me has always > been USB... I agree about the speed- but not with the issue of hanging. When pvmove works the IO load is moderate (about 20% or less). But when it hangs it jumps up to 100% on one or more cores. > Are you 100% certainty the devices underlying all PVs are good, that > you can dd 100% successfully? Yes. I can do resize2fs, cp, mv and dd, too. Well, I haven't tried to dd the whole devices as they are aprox. 1.5TB in size. But I'd say this is fine! GReetings Christian -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFJFmcM0XNIYlAXmzsRAiQOAJ9Fo6SA3+yBGlZ6Ky0bKDw1sStAGACgmprm pT+asXOQS/a0MMQ2jQoCeGo= =eMR2 -----END PGP SIGNATURE-----