From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Mick Subject: Re: When to use "filestore xattr use omap = true" Date: Thu, 03 Jan 2013 14:48:33 -0800 Message-ID: <50E60AC1.40908@inktank.com> References: <50E5F639.2020001@inktank.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-da0-f53.google.com ([209.85.210.53]:61083 "EHLO mail-da0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754022Ab3ACWsh (ORCPT ); Thu, 3 Jan 2013 17:48:37 -0500 Received: by mail-da0-f53.google.com with SMTP id x6so7167439dac.12 for ; Thu, 03 Jan 2013 14:48:36 -0800 (PST) In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Roberto Aguilar Cc: Mark Nelson , ceph-devel@vger.kernel.org Thanks for the help, Roberto. Sure, send a pull request. On 01/03/2013 01:31 PM, Roberto Aguilar wrote: > Thanks for clarifying, Mark. I made a quick change to the docs: > > https://github.com/rca/ceph/commit/37b57cdf0fdc5c03eeff3f5eb58ff4010ce581f6 > > Can I send you a pull request? > > Thanks, > -Roberto. > > On Thu, Jan 3, 2013 at 1:20 PM, Mark Nelson wrote: >> On 01/03/2013 03:16 PM, Roberto Aguilar wrote: >>> >>> Hello, >>> >>> I read the "Filesystems" section in the "Hard disk and file system >>> recommendations" [1] documentation and was confused on whether or not >>> I should be using the setting: >>> >>> filestore xattr use omap = true >>> >>> The section reads: >>> >>> "[...] but the ext4 is too small to be usable. To use these file >>> systems, you should add the following like to the [osd] section of >>> your ceph.conf file.:" >>> >>> Does that mean I the setting applies to systems that are using ext4, >>> or does it apply to _any_ filesystem that was mentioned, i.e. btrfs, >>> xfs, and ext4. >>> >>> Thanks! >>> -Roberto. >>> >>> [1] >>> http://ceph.com/docs/master/rados/configuration/filesystem-recommendations/ >>> -- >>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in >>> the body of a message to majordomo@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> >> Hi Roberto, >> >> You should always use "filestore xattr use omap = true" with EXT4. You can >> optionally use it for BTRFS and XFS. I've done a bit of testing and haven't >> yet been able to determine if there is any significant advantage or >> disadvantage to using it on BTRFS and XFS from a performance perspective. >> So far the performance differences haven't been consistent or significant >> enough to be conclusive. >> >> Mark >> > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >