Re: [ceph-users] rbd object mapping

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Thank you Konstantin!
Tony
________________________________________
From: Konstantin Shalygin <k0ste@xxxxxxxx>
Sent: August 9, 2021 01:20 AM
To: Tony Liu
Cc: ceph-users; dev@xxxxxxx
Subject: Re: [ceph-users] rbd object mapping


On 8 Aug 2021, at 20:10, Tony Liu <tonyliu0592@xxxxxxxxxxx<mailto:tonyliu0592@xxxxxxxxxxx>> wrote:

That's what I thought. I am confused by this.

# ceph osd map vm fcb09c9c-4cd9-44d8-a20b-8961c6eedf8e_disk
osdmap e18381 pool 'vm' (4) object 'fcb09c9c-4cd9-44d8-a20b-8961c6eedf8e_disk' -> pg 4.c7a78d40 (4.0) -> up ([4,17,6], p4) acting ([4,17,6], p4)

It calls RBD image "object" and it shows the whole image maps to a single PG,
while the image is actually split into many objects each of which maps to a PG.
How am I supposed to understand the output of this command?

You can execute `ceph osd map vm nonexist` and you will see mapping for 'nonexist' object. Future mapping...
To achieve mappings for each object of your image, you need to find all objects by rbd_header and iterate over this list.



k
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