Re: Query regarding storage of objects in ceph

[Brad Hubbard <bhubbard@redhat.com>]

On Tue, Sep 6, 2016 at 2:31 PM, Elita Lobo <loboelita@gmail.com> wrote:
> Hello,
>
> I am using Ceph in my research project and hence need to know a bit
> about how it works internally.  I would be grateful if someone would
> answer my queries.
>
>  When chunks of 2 objects have to be stored on an osd, are they put
> into the same file or are these chunks stored in separate file. Is
> there any way I could see this data using some command? And in which
> folder of the osd are they stored in?

Working your way through this may help.

http://cephnotes.ksperis.com/blog/2013/08/20/ceph-osd-where-is-my-data

>
> Also, is there a way I can see the whole flow of function calls made
> when a node repair is going on?
>
> Lastly, could someone please suggest some resources ( other than docs)
> which would help me understand the internal implementation and give me
> an idea how to debug in ceph. (Attaching gdb to ceph daemons running
> in the background etc)
>
> Thanking you,
> Yours sincerely,
> Elita Lobo
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-- 
Cheers,
Brad