Re: un-even data filled on OSDs

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On Tue, 7 Jun 2016, M Ranga Swami Reddy wrote:
> Hi Sage,
> >Jewel and the latest hammer point release have an improved
> >reweight-by-utilization (ceph osd test-reweight-by-utilization ... to dry
> > run) to correct this.
> 
> Thank you....But not planning to upgrade the cluster soon.
> So, in this case - are there any tunable options will help? like
> "crush tunable optimal" or so?
> OR any other configuration options change will help?

Firefly also has reweight-by-utilization... it's just a bit less friendly 
than the newer versions.  CRUSH tunables don't generally help here unless 
you have lots of OSDs that are down+out.

Note that firefly is no longer supported.

sage


> 
> 
> Thanks
> Swami
> 
> 
> On Tue, Jun 7, 2016 at 6:00 PM, Sage Weil <sage@xxxxxxxxxxxx> wrote:
> > On Tue, 7 Jun 2016, M Ranga Swami Reddy wrote:
> >> Hello,
> >> I have aorund 100 OSDs in my ceph cluster. In this a few OSDs filled
> >> with >85% of data and few OSDs filled with ~60%-70% of data.
> >>
> >> Any reason why the unevenly OSDs filling happned? do I need to any
> >> tweaks on configuration to fix the above? Please advise.
> >>
> >> PS: Ceph version is - 0.80.7
> >
> > Jewel and the latest hammer point release have an improved
> > reweight-by-utilization (ceph osd test-reweight-by-utilization ... to dry
> > run) to correct this.
> >
> > sage
> >
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