> Op 13 juli 2016 om 14:47 schreef Kees Meijs <[email protected]>:
> 
> 
> Thanks!
> 
> So to sum up, I'd best:
> 
>   * set the noout flag
>   * stop the OSDs one by one
>   * shut down the physical node
>   * jank the OSD drives to prevent ceph-disk(8) from automaticly
>     activating at boot time
>   * do my maintainance
>   * start the physical node
>   * reseat and activate the OSD drives one by one
>   * unset the noout flag
> 

That should do it indeed. Take your time between the OSDs and that should limit 
the 'downtime' for clients.

Wido

> On 13-07-16 14:39, Jan Schermer wrote:
> > If you stop the OSDs cleanly then that should cause no disruption to 
> > clients.
> > Starting the OSD back up is another story, expect slow request for a while 
> > there and unless you have lots of very fast CPUs on the OSD node, start 
> > them one-by-one and not all at once.
> 
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