Hi Dan ,
I have set replication factor to 3 of pool 'newbyh' . Then when i
tried to execute cmds told by you I got that it reported like
----------------------------------------------------
root@third-virtual-machine:~# osdmaptool --test-map-object Obj1 osdmap
osdmaptool: osdmap file 'osdmap'
object 'Obj1' -> 0.c3c4 -> [0,1]
-----------------------------------------------------
I even checked manually the dirs at every node . it shows proper data
available within osd0,osd1 & osd2 . ( i hve 3 node cluster using VM
Ceph v0.36 )
So my questions is why in above execution it shows that Obj1 is at
[0,1] .. it should report all nodes like [0,1,2] .
-
Hemant Surale.
On Wed, Sep 26, 2012 at 2:04 AM, Dan Mick <dan.mick@xxxxxxxxxxx> wrote:
> Hemant:
>
> Yes, you can. Use ceph osd getmap -o <file> to get the OSD map, and then
> use osdmaptool --find-object-map <objectname> <file> to output the
> PG the object hashes to and the list of OSDs that PG maps to (primary
> first):
>
> $ ceph osd getmap -o osdmap
> got osdmap epoch 59
> $ osdmaptool --test-map-object dmick.rbd osdmap
> osdmaptool: osdmap file 'osdmap'
> object 'dmick.rbd' -> 0.69c8 -> [3,1]
>
> shows dmick.rbd mapping to pg 0.69c8, which in turn maps to OSDs 3 and 1, 3
> being the primary.
>
>
> On 09/25/2012 02:30 AM, hemant surale wrote:
>>
>> Hi Community,
>> Is it possible to identify where exactly primary copy of obj
>> is stored ? I am using crushmaps to use specific osds for data
>> placement but i want to knw the primary capoy location. Or I need to
>> replace pseudo random function by some deterministic function to guide
>> ceph to utilize specific osd?
>>
>>
>> Regards,
>> Hemant Surale.
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>
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