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.reini...@filmakademie.de> wrote:

> Thanks!
>
> Götz
>
>
> Am 14.02.2018 um 11:16 schrieb Kai Wagner <kwag...@suse.com>:
>
> 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
> IT-Koordinator
> IT-OfficeNet
> +49 7141 969 82420 <+49%207141%2096982420>
> goetz.reini...@filmakademie.de
>
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> [image: Filmakademie Baden Württemberg] <http://www.filmakademie.de/>
>
> Götz Reinicke
> IT-Koordinator
> IT-OfficeNet
> +49 7141 969 82420 <+49%207141%2096982420>
> goetz.reini...@filmakademie.de
>
> Filmakademie Baden-Württemberg GmbH
> Akademiehof 10 71638 Ludwigsburg
> http://www.filmakademie.de
>
> [image: Twitter] <https://twitter.com/filmakademiebw> [image: Facebook]
> <https://de-de.facebook.com/filmakademiebw> [image: Youtube]
> <https://www.youtube.com/user/TheFilmakademie> [image: Vimeo]
> <https://vimeo.com/filmakademiebw>
>
> 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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