AGH! So sorry Hemant. I really was thinking 'map' when I typed that.
On 09/26/2012 04:41 PM, Sage Weil wrote:
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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