[Questions]Can client know which OSDs are storing the data?

[Questions]Can client know which OSDs are storing the data?

[Dennis Chen]

Hello Guys,

My question is very rude and direct, a little bit stupid maybe ;-)

Question a: a client write a file to the cluster (supposing replica =
3), so the data will be stored in 3 OSDs within the cluster, can I get
the information of which OSDs storing the file data in client side?

Question b: can the object data still be replicated if I store a
object from client with RADOS API?

Thank you guys !
-- 
Den

RE: [Questions]Can client know which OSDs are storing the data?

[Ma, Jianpeng]

> -----Original Message-----
> From: ceph-devel-owner@vger.kernel.org
> [mailto:ceph-devel-owner@vger.kernel.org] On Behalf Of Dennis Chen
> Sent: Tuesday, January 27, 2015 3:07 PM
> To: ceph-devel@vger.kernel.org; Dennis Chen
> Subject: [Questions]Can client know which OSDs are storing the data?
> 
> Hello Guys,
> 
> My question is very rude and direct, a little bit stupid maybe ;-)
> 
> Question a: a client write a file to the cluster (supposing replica = 3), so the
> data will be stored in 3 OSDs within the cluster, can I get the information of
> which OSDs storing the file data in client side?
> 
Ceph osd map <poolname> <objectname>
Display the osd and pg which store object.

> Question b: can the object data still be replicated if I store a object from client
> with RADOS API?
Yes, rados api is also a client.
> 
> Thank you guys !
> --
> Den
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