On Wed, 26 Sep 2012, Dan Mick wrote:
> Ah, yeah, that assumption would be a problem.
>
> So, Hemant, does
> ceph osd dump <poolname> <objectname>
Ahem,
ceph osd map <poolname> <objectname>
:) sage
>
> show you information that makes sense?
>
> On 09/26/2012 08:21 AM, Sage Weil wrote:
> > On Wed, 26 Sep 2012, hemant surale wrote:
> > > 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] .
> >
> > The --test-map-object is currently somewhat useless because it assumes
> > pool 0 ('data'), and your object is probably in a different pool.
> >
> > sage
> >
> > >
> > >
> > >
> > > -
> > > 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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