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 q3AEWmVC162436 for ; Tue, 10 Apr 2012 09:32:48 -0500 Received: from mail-iy0-f181.google.com (mail-iy0-f181.google.com [209.85.210.181]) by cuda.sgi.com with ESMTP id yOJZQAfsT7wHtEAm (version=TLSv1 cipher=RC4-SHA bits=128 verify=NO) for ; Tue, 10 Apr 2012 07:32:47 -0700 (PDT) Received: by iagk10 with SMTP id k10so8362441iag.26 for ; Tue, 10 Apr 2012 07:32:46 -0700 (PDT) Message-ID: <4F844474.3010005@gmail.com> Date: Tue, 10 Apr 2012 10:32:20 -0400 From: Joe Landman MIME-Version: 1.0 Subject: Re: XFS: Abysmal write performance because of excessive seeking (allocation groups to blame?) References: <20120405213740.GA22824@infradead.org> <201204072057.38286.Martin@lichtvoll.de> In-Reply-To: List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com T24gMDQvMTAvMjAxMiAxMDowMiBBTSwgU3RlZmFuIFJpbmcgd3JvdGU6Cj4+IEFuZCBpcyBYRlMg YWxpZ25lZCB0byB0aGUgUkFJRCA2Pwo+Pgo+PiBXaGF0IGRvZXMgeGZzX2luZm8gZGlzcGxheSBv biBpdD8KPgo+IFllcywgaXTigJlzIGFsaWduZWQuCj4KPiBtZXRhLWRhdGE9L2Rldi9tYXBwZXIv dmdfZGF0YS1sdmhvbWUgaXNpemU9MjU2ICAgIGFnY291bnQ9NCwKPiBhZ3NpemU9NzMyMzM2NTYg Ymxrcwo+ICAgICAgICAgICA9ICAgICAgICAgICAgICAgICAgICAgICBzZWN0c3o9NTEyICAgYXR0 cj0yCj4gZGF0YSAgICAgPSAgICAgICAgICAgICAgICAgICAgICAgYnNpemU9NDA5NiAgIGJsb2Nr cz0yOTI5MzQ2MjQsIGltYXhwY3Q9NQo+ICAgICAgICAgICA9ICAgICAgICAgICAgICAgICAgICAg ICBzdW5pdD04ICAgICAgc3dpZHRoPTMyIGJsa3MKPiBuYW1pbmcgICA9dmVyc2lvbiAyICAgICAg ICAgICAgICBic2l6ZT00MDk2ICAgYXNjaWktY2k9MAo+IGxvZyAgICAgID1pbnRlcm5hbCAgICAg ICAgICAgICAgIGJzaXplPTQwOTYgICBibG9ja3M9MTQzMDQwLCB2ZXJzaW9uPTIKPiAgICAgICAg ICAgPSAgICAgICAgICAgICAgICAgICAgICAgc2VjdHN6PTUxMiAgIHN1bml0PTggYmxrcywgbGF6 eS1jb3VudD0xCj4gcmVhbHRpbWUgPW5vbmUgICAgICAgICAgICAgICAgICAgZXh0c3o9NDA5NiAg IGJsb2Nrcz0wLCBydGV4dGVudHM9MAo+Cj4gSSBjaGFuZ2VkIHRoZSBzdHJpcGUgc2l6ZSB0byAz MmtiIGluIHRoZSBtZWFudGltZS4gVGhpcyB3YXksIGl0Cj4gcGVyZm9ybXMgc2xpZ2h0bHkgYmV0 dGVyLgoKdHJ5IDEyOGsgdG8gNTEyayBmb3Igc3RyaXBlIHNpemUuICBBbmQgdHJ5IHRvIGluY3Jl YXNlIHlvdXIgYWdjb3VudCBieSAKKG5lYXJseSkgYW4gb3JkZXIgb2YgbWFnbml0dWRlLgoKCi0t IApKb3NlcGggTGFuZG1hbiwgUGguRApGb3VuZGVyIGFuZCBDRU8KU2NhbGFibGUgSW5mb3JtYXRp Y3MgSW5jLgplbWFpbDogbGFuZG1hbkBzY2FsYWJsZWluZm9ybWF0aWNzLmNvbQp3ZWIgIDogaHR0 cDovL3NjYWxhYmxlaW5mb3JtYXRpY3MuY29tCiAgICAgICAgaHR0cDovL3NjYWxhYmxlaW5mb3Jt YXRpY3MuY29tL3NpY2x1c3RlcgpwaG9uZTogKzEgNzM0IDc4NiA4NDIzIHgxMjEKZmF4ICA6ICsx IDg2NiA4ODggMzExMgpjZWxsIDogKzEgNzM0IDYxMiA0NjE1CgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwp4ZnMgbWFpbGluZyBsaXN0Cnhmc0Bvc3Muc2dp LmNvbQpodHRwOi8vb3NzLnNnaS5jb20vbWFpbG1hbi9saXN0aW5mby94ZnMK