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.
>
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>
>
--
Thanks & Regards
Shylesh Kumar M
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