From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q38Lk7XM206123 for ; Sun, 8 Apr 2012 16:46:07 -0500 Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id jMoPTK6TspEGGBF7 for ; Sun, 08 Apr 2012 14:46:04 -0700 (PDT) Date: Sun, 8 Apr 2012 23:45:55 +0200 From: Emmanuel Florac Subject: Re: XFS: Abysmal write performance because of excessive seeking (allocation groups to blame?) Message-ID: <20120408234555.695e291f@galadriel.home> In-Reply-To: <4F81F5FD.1090809@hardwarefreak.com> References: <20350.9643.379841.771496@tree.ty.sabi.co.UK> <20350.13616.901974.523140@tree.ty.sabi.co.UK> <4F7F7C25.8040605@hardwarefreak.com> <20120407104912.44881be3@galadriel.home> <4F81F5FD.1090809@hardwarefreak.com> Mime-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: stan@hardwarefreak.com Cc: Stefan Ring , Linux fs XFS TGUgU3VuLCAwOCBBcHIgMjAxMiAxNTozMzowMSAtMDUwMCB2b3VzIMOpY3JpdmllejoKCj4gPiAK PiA+IEZyb20gbXkgZXhwZXJpZW5jZSwgd2l0aCBtb2Rlcm4gYXJyYXlzIGRvbid0IG1ha2UgbXVj aCBvZiBhCj4gPiBkaWZmZXJlbmNlLiBJJ3ZlIHJlYWNoZWQgZGVjZW50IElPUFMgKGkuIGUuIGFi b3V0IDQwMDAgSU9QUykgb24KPiA+IGxhcmdlIGFycmF5cyBvZiB1cCB0byA0NiBkcml2ZXMgcHJv dmlkZWQgdGhlcmUgYXJlIGVub3VnaCB0aHJlYWRzCj4gPiAtLSBtb3JlIHRocmVhZHMgdGhhbiBz cGluZGxlcywgcHJlZmVyYWJseS4gIAo+IAo+IEFyZSB5b3Ugc3BlYWtpbmcgb2YgYSBtaXhlZCBt ZXRhZGF0YS9kYXRhIGhlYXZ5IElPUFMgd29ya2xvYWQgc2ltaWxhcgo+IHRvIHRoYXQgd2hpY2gg aXMgdGhlIGZvY3VzIG9mIHRoaXMgdGhyZWFkLCBvciBhbm90aGVyIHR5cGUgb2YKPiB3b3JrbG9h ZD8gIElzIHRoaXMgNDYgZHJpdmUgYXJyYXkgUkFJRDEwIG9yIFJBSUQ2PwoKUHVyZSByYW5kb20g YWNjZXNzLCA4SyBJTyBiZW5jaG1hcmsgKGRhdGFiYXNlIHNpbXVsYXRpb24pLiBSQUlELTYKcGVy Zm9ybXMgYWJvdXQgdGhlIHNhbWUgaW4gcHVyZSByZWFkaW5nIHRlc3RzLCBidXQgc3RpbmtzIHRl cnJpYmx5IGF0CndyaXRpbmcgb2YgY291cnNlLgoKLS0gCi0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLQpFbW1hbnVl bCBGbG9yYWMgICAgIHwgICBEaXJlY3Rpb24gdGVjaG5pcXVlCiAgICAgICAgICAgICAgICAgICAg fCAgIEludGVsbGlxdWUKICAgICAgICAgICAgICAgICAgICB8CTxlZmxvcmFjQGludGVsbGlxdWUu Y29tPgogICAgICAgICAgICAgICAgICAgIHwgICArMzMgMSA3OCA5NCA4NCAwMgotLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCnhm cyBtYWlsaW5nIGxpc3QKeGZzQG9zcy5zZ2kuY29tCmh0dHA6Ly9vc3Muc2dpLmNvbS9tYWlsbWFu L2xpc3RpbmZvL3hmcwo=