From: Mark Nelson <mnelson@redhat.com>
To: Sage Weil <sage@newdream.net>,
ceph-devel@vger.kernel.org, ceph-users@ceph.com,
ceph-maintainers@ceph.com, ceph-announce@ceph.com
Subject: Re: Deprecating ext4 support
Date: Mon, 11 Apr 2016 16:57:16 -0500 [thread overview]
Message-ID: <570C1DBC.3040408@redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.11.1604111742010.29593@cpach.fuggernut.com>
On 04/11/2016 04:44 PM, Sage Weil wrote:
> On Mon, 11 Apr 2016, Sage Weil wrote:
>> Hi,
>>
>> ext4 has never been recommended, but we did test it. After Jewel is out,
>> we would like explicitly recommend *against* ext4 and stop testing it.
>
> I should clarify that this is a proposal and solicitation of feedback--we
> haven't made any decisions yet. Now is the time to weigh in.
To add to this on the performance side, we stopped doing regular
performance testing on ext4 (and btrfs) sometime back around when ICE
was released to focus specifically on filestore behavior on xfs. There
were some cases at the time where ext4 was faster than xfs, but not
consistently so. btrfs is often quite fast on fresh fs, but degrades
quickly due to fragmentation induced by cow with
small-writes-to-large-object workloads (IE RBD small writes). If btrfs
auto-defrag is now safe to use in production it might be worth looking
at again, but probably not ext4.
Set sail for bluestore!
Mark
>
> sage
> --
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next prev parent reply other threads:[~2016-04-11 21:57 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-11 21:39 Deprecating ext4 support Sage Weil
[not found] ` <alpine.DEB.2.11.1604111632520.13448-Wo5lQnKln9t9PHm/lf2LFUEOCMrvLtNR@public.gmane.org>
2016-04-11 21:42 ` Allen Samuels
2016-04-11 21:47 ` [ceph-users] " Jan Schermer
2016-04-11 23:39 ` Christian Balzer
2016-04-12 1:12 ` [ceph-users] " Sage Weil
[not found] ` <alpine.DEB.2.11.1604112046570.29593-Wo5lQnKln9t9PHm/lf2LFUEOCMrvLtNR@public.gmane.org>
2016-04-12 1:32 ` Shinobu Kinjo
2016-04-12 2:05 ` [Ceph-maintainers] " hp cre
2016-04-12 2:43 ` [ceph-users] " Christian Balzer
2016-04-12 13:56 ` Sage Weil
[not found] ` <alpine.DEB.2.11.1604120837120.29593-Wo5lQnKln9t9PHm/lf2LFUEOCMrvLtNR@public.gmane.org>
2016-04-13 3:27 ` Christian Balzer
[not found] ` <20160412083925.5106311d-9yhXNL7Kh0lSCLKNlHTxZM8NsWr+9BEh@public.gmane.org>
2016-04-14 9:43 ` Antw: " Steffen Weißgerber
2016-04-12 7:00 ` Michael Metz-Martini | SpeedPartner GmbH
2016-04-13 2:29 ` [ceph-users] " Christian Balzer
2016-04-13 12:30 ` Sage Weil
2016-04-14 0:57 ` Christian Balzer
2016-04-13 12:51 ` Michael Metz-Martini | SpeedPartner GmbH
2016-04-11 21:44 ` Sage Weil
2016-04-11 21:57 ` Mark Nelson [this message]
[not found] ` <570C1DBC.3040408-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-04-11 22:49 ` Shinobu Kinjo
2016-04-11 23:54 ` [ceph-users] " Robin H. Johnson
2016-04-11 23:09 ` Lionel Bouton
2016-04-12 7:45 ` [ceph-users] " Jan Schermer
2016-04-12 18:00 ` Sage Weil
2016-04-12 19:19 ` Jan Schermer
2016-04-12 19:58 ` Sage Weil
2016-04-12 20:33 ` Jan Schermer
2016-04-12 20:47 ` Sage Weil
[not found] ` <alpine.DEB.2.11.1604121639590.29593-Wo5lQnKln9t9PHm/lf2LFUEOCMrvLtNR@public.gmane.org>
2016-04-12 21:08 ` Nick Fisk
[not found] ` <4f0f087c.9Ro.9Gf.hg.1qX1VyMOaD-ImYt9qTNe79BDgjK7y7TUQ@public.gmane.org>
2016-04-12 21:22 ` wido-fspyXLx8qC4
[not found] ` <362740c3.9Ro.9Gf.hg.1qX1VyMOaE@mailjet.com>
2016-04-12 23:12 ` [ceph-users] " Jan Schermer
2016-04-13 13:13 ` Sage Weil
2016-04-13 13:06 ` Sage Weil
2016-04-14 18:05 ` Jianjian Huo
2016-04-14 18:30 ` Samuel Just
2016-04-12 6:39 ` [Ceph-maintainers] " Loic Dachary
2016-04-13 14:19 ` [ceph-users] " Francois Lafont
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