Thanks for the reply shylesh, but the procedure is not working. In ceph.com
it is mentioned that we can make particular osd as a primary osd by setting
primary affinity weightage between 0-1. But it is not working.
On 14 Jun 2016 16:15, "shylesh kumar" <shylesh.mo...@gmail.com> wrote:
> Hi,
>
> I think you can edit the crush rule something like below
>
> rule another_replicated_ruleset {
> ruleset 1
> type replicated
> min_size 1
> max_size 10
> step take default
> step take osd1
> step choose firstn 1 type osd
> step emit
> step take osd2
> step choose firstn 1 type osd
> step emit
> step take osd5
> step choose firstn 1 type osd
> step emit
> step take osd4
> step choose firstn 1 type osd
> step emit
> }
>
> and create pool using this rule.
>
> It might work , though I am not 100% sure.
>
> Thanks,
> Shylesh
>
> On Tue, Jun 14, 2016 at 4:05 PM, Kanchana. P <kanchanared...@vedams.com>
> wrote:
>
>> Hi,
>>
>> How to select particular OSD to act as primary OSD.
>> I modified the ceph.conf file and added
>> [mon]
>> ...
>> mon osd allow primary affinity = true
>> Restarted ceph target, now primary affinity is set to true in all monitor
>> nodes.
>> Using the below commands set some weights to the osds.
>>
>> $ ceph osd primary-affinity osd.1 0.25
>> $ ceph osd primary-affinity osd.6 0.50
>> $ ceph osd primary-affinity osd.11 0.75
>> $ ceph osd primary-affinity osd.16 1
>>
>> Created a pool "poolA" and set a crush_ruleset so that it takes OSDs in
>> order 16,11,6,1
>> Even after setting the primary affinity weight, it took osds in different
>> order.
>> Can we select the primary OSD, if so, how can we do that. Please let me
>> know what I am missing here to set an OSD as a primary OSD.
>>
>> _______________________________________________
>> ceph-users mailing list
>> ceph-users@lists.ceph.com
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>
>>
>
>
> --
> Thanks & Regards
> Shylesh Kumar M
>
>
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