From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexandre DERUMIER <aderumier@odiso.com>
Subject: Re: Severe performance degradation with jewel rbd image
Date: Sat, 28 May 2016 09:29:15 +0200 (CEST)
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To: dillaman@redhat.com
Cc: Somnath Roy <Somnath.Roy@sandisk.com>, Samuel Just <sjust@redhat.com>, ceph-devel <ceph-devel@vger.kernel.org>

Hi,

qemu should have soon multithreaded disk access support (multi queues +=
 multi iothreads)

https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg05023.html

Do you think it'll work with exclusive-lock ?

----- Mail original -----
De: "Jason Dillaman" <jdillama@redhat.com>
=C3=80: "Somnath Roy" <Somnath.Roy@sandisk.com>
Cc: "Samuel Just" <sjust@redhat.com>, "ceph-devel" <ceph-devel@vger.ker=
nel.org>
Envoy=C3=A9: Jeudi 26 Mai 2016 20:52:26
Objet: Re: Severe performance degradation with jewel rbd image

You can dynamically enable/disable exclusive-lock, object-map,=20
fast-diff, and journaling after the image is created via "rbd feature=20
disable <image-spec> <feature>". The deep-flatten feature can be=20
disabled-only via the same CLI.=20
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