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 q378rmxV214219 for ; Sat, 7 Apr 2012 03:53:49 -0500 Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id pgzNNdprt0Pad53C for ; Sat, 07 Apr 2012 01:53:46 -0700 (PDT) Date: Sat, 7 Apr 2012 10:53:18 +0200 From: Emmanuel Florac Subject: Re: XFS: Abysmal write performance because of excessive seeking (allocation groups to blame?) Message-ID: <20120407105318.7d31b413@galadriel.home> In-Reply-To: References: <20350.9643.379841.771496@tree.ty.sabi.co.UK> <20350.13616.901974.523140@tree.ty.sabi.co.UK> <4F7F7C25.8040605@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: Stefan Ring Cc: stan@hardwarefreak.com, Linux fs XFS TGUgU2F0LCA3IEFwciAyMDEyIDA5OjI3OjUwICswMjAwIHZvdXMgw6ljcml2aWV6OgoKPiBTbyBp dCBzb3VuZHMgbGlrZSB0aGF0IGZvciBwb29yIGd1eXMgbGlrZSB1cywgd2hvIGNhbuKAmXQgYWZm b3JkIHRoZQo+IGhhcmR3YXJlIHRvIGhhdmUgZG96ZW5zIG9mIHNwaW5kbGVzLCB0aGUgYmVzdCBv cHRpb24gd291bGQgYmUgdG8KPiBjcmVhdGUgdGhlIFhGUyBmaWxlIHN5c3RlbSB3aXRoIGFnY291 bnQ9MT8gVGhhdCBzZWVtcyB0byBiZSB0aGUgb25seQo+IHJlYXNvbmFibGUgY29uY2x1c2lvbiB0 byBtZSwgc2luY2UgYSBzaW5nbGUgUkFJRCBkZXZpY2UsIGxpa2UgYSBzaW5nbGUKPiBkaXNrLCBj YW5ub3Qgd3JpdGUgaW4gcGFyYWxsZWwgYW55d2F5LgoKWW91IGJlc3Qgb3B0aW9uIGlzIHRvIGJ1 eSBhIFNTRC4gU2VyaW91c2x5LCBldmVuIGEgYmFzaWMgZGVjZW50IGNvbnN1bWVyCm1vZGVsIHdp bGwgYnVyeSB5b3VyIGFycmF5IGluIHRoZSBkdXN0LiBBbHNvLCByZWNlbnQgUkFJRCBjb250cm9s bGVycwpmcm9tIExTSSBhbmQgQWRhcHRlYyBhcmUgYWJsZSB0byAiZW5oYW5jZSIgYSBzcGlubmlu ZyBydXN0IGFycmF5IGJ5CnVzaW5nIGFuIFNTRCBhcyBhIGNhY2hlLgoKLS0gCi0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLQpFbW1hbnVlbCBGbG9yYWMgICAgIHwgICBEaXJlY3Rpb24gdGVjaG5pcXVlCiAgICAgICAg ICAgICAgICAgICAgfCAgIEludGVsbGlxdWUKICAgICAgICAgICAgICAgICAgICB8CTxlZmxvcmFj QGludGVsbGlxdWUuY29tPgogICAgICAgICAgICAgICAgICAgIHwgICArMzMgMSA3OCA5NCA4NCAw MgotLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fCnhmcyBtYWlsaW5nIGxpc3QKeGZzQG9zcy5zZ2kuY29tCmh0dHA6Ly9vc3Muc2dp LmNvbS9tYWlsbWFuL2xpc3RpbmZvL3hmcwo=