From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Re: RBD fio Performance concerns Date: Thu, 22 Nov 2012 08:37:56 -0600 Message-ID: <50AE38C4.6000909@inktank.com> References: <0a4a4396-60cd-4782-8743-b2bbba2d2488@mailpro> <50AE351F.9080505@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-ie0-f174.google.com ([209.85.223.174]:55183 "EHLO mail-ie0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932241Ab2KVSum (ORCPT ); Thu, 22 Nov 2012 13:50:42 -0500 Received: by mail-ie0-f174.google.com with SMTP id k11so2380405iea.19 for ; Thu, 22 Nov 2012 10:50:42 -0800 (PST) In-Reply-To: <50AE351F.9080505@profihost.ag> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Stefan Priebe - Profihost AG Cc: Alexandre DERUMIER , ceph-devel , Mark Kampe , =?UTF-8?B?U8OpYmFzdGllbiBIYW4=?= I don't think we recommend tmpfs at all for anything other than playing= =20 around. :) On 11/22/2012 08:22 AM, Stefan Priebe - Profihost AG wrote: > Hi, > > can someone from inktank comment this? Might be using /dev/ram0 with = an > fs on it be better than tmpfs as we can use dio? > > Greets, > Stefan > >> ----- Mail original ----- >> >> De: "Stefan Priebe - Profihost AG" >> =C3=80: "S=C3=A9bastien Han" >> Cc: "Mark Nelson" , "Alexandre DERUMIER" >> , "ceph-devel" , >> "Mark Kampe" >> Envoy=C3=A9: Jeudi 22 Novembre 2012 14:29:03 >> Objet: Re: RBD fio Performance concerns >> >> Am 22.11.2012 14:22, schrieb S=C3=A9bastien Han: >>> And RAMDISK devices are too expensive. >>> >>> It would make sense in your infra, but yes they are really expensiv= e. >> >> We need something like tmpfs - running in local memory but support d= io. >> >> Stefan >> --=20 Mark Nelson Performance Engineer Inktank -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html