Re: Question about ceph-balancer and OSD reweights

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I talked to some guys on IRC about going back to the non-1 reweight
OSD's and setting them to 1.

I went from a standard deviation of 2+ to 0.5.

Awesome.

On Wed, Feb 26, 2020 at 10:08 AM shubjero <shubjero@xxxxxxxxx> wrote:
>
> Right, but should I be proactively returning any reweighted OSD's that
> are not 1.0000 to 1.0000?
>
> On Wed, Feb 26, 2020 at 3:36 AM Konstantin Shalygin <k0ste@xxxxxxxx> wrote:
> >
> > On 2/26/20 3:40 AM, shubjero wrote:
> > > I'm running a Ceph Mimic cluster 13.2.6 and we use the ceph-balancer
> > > in upmap mode. This cluster is fairly old and pre-Mimic we used to set
> > > osd reweights to balance the standard deviation of the cluster. Since
> > > moving to Mimic about 9 months ago I enabled the ceph-balancer with
> > > upmap mode and let it do its thing but I did not think about setting
> > > the previously modified reweights back to 1.00000 (not sure if this is
> > > fine or would have been a best practice?)
> > >
> > > Does the ceph-balancer in upmap mode manage the osd reweight
> > > dynamically? Just wondering if I need to proactively go back and set
> > > all non 1.00000 reweights to 1.00000.
> >
> > Balancer in upmap mode should always work on not reweighed (e.g. 1.0000)
> > OSD's.
> >
> >
> >
> > k
> >
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