Re: Shutting down half / full cluster

[David Turner <drakonstein@xxxxxxxxx>]

ceph osd set noout

ceph osd set nobackfill

ceph osd set norecover

Noout will prevent OSDs from being marked out during the maintenance and no PGs will be able to shift data around with the other 2 flags.  After everything is done, unset the 3 flags and you're good to go.

On Wed, Feb 14, 2018 at 5:25 AM Götz Reinicke <goetz.reinicke@xxxxxxxxxxxxxxx> wrote:

Thanks!

Götz

Am 14.02.2018 um 11:16 schrieb Kai Wagner <kwagner@xxxxxxxx>:

Hi,

maybe it's worth looking at this:

http://lists.ceph.com/pipermail/ceph-users-ceph.com/2017-April/017378.html

Kai

On 02/14/2018 11:06 AM, Götz Reinicke wrote:

Hi,

We have some work to do on our power lines for all building and we have to shut down all systems. So there is also no traffic on any ceph client.

Pitty, we have to shot down some ceph nodes too in an affected building.

To avoid rebalancing - as I see there is no need for it, as there is no traffic on clients - how can I safely set the remaining cluster nodes in a „keep calm and wait“ state?

Is that the noout option?

Thanks for feedback and suggestions! Regards . Götz

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Götz Reinicke
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IT-OfficeNet
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Filmakademie Baden-Württemberg GmbH
Akademiehof 10 71638 Ludwigsburg
http://www.filmakademie.de

Eintragung Amtsgericht Stuttgart HRB 205016
Vorsitzende des Aufsichtsrates:
Petra Olschowski
Staatssekretärin im Ministerium für Wissenschaft,
Forschung und Kunst Baden-Württemberg

Geschäftsführer:
Prof. Thomas Schadt

Götz Reinicke
IT-Koordinator
IT-OfficeNet
+49 7141 969 82420
goetz.reinicke@xxxxxxxxxxxxxxx

Filmakademie Baden-Württemberg GmbH
Akademiehof 10 71638 Ludwigsburg
http://www.filmakademie.de

Eintragung Amtsgericht Stuttgart HRB 205016
Vorsitzende des Aufsichtsrates:
Petra Olschowski
Staatssekretärin im Ministerium für Wissenschaft,
Forschung und Kunst Baden-Württemberg

Geschäftsführer:
Prof. Thomas Schadt

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ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

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