Great, I found the file which contains the data
root@ceph-osd1:/var/local/osd1/current# grep "hello3" * -r
1.0_head/100000003fb.00000000__head_4BC00833__1:hello3
And it does indeed match to the hex ino.
How does it determined that the data will go to 1.0_head and what does head_4BC00833 stand for.
Thanks again for your prompt response.
Regards
Mudit
On Tue, Feb 3, 2015 at 3:26 PM, Sage Weil <sage@xxxxxxxxxxxx> wrote:
On Tue, 3 Feb 2015, Mudit Verma wrote:
> Hi Sage,
> Following are the greps through inotify, I created a file name cris at
> client end
>
> From stats the ino number is 1099511628795
100000003fb
The object names will be something like 100000003fb.00000001. The
filenames once they hit disk will get the __head_$hash type suffix based
on a hash of the name and some other random stuff. I think the __2 is
the pool id.
sage
>
> but it does not match to the hex 06E5F474
>
>
> On ODS:
>
> /var/local/osd1/current/2.0_head/ OPEN 200.00000001__head_06E5F474__2
>
> /var/local/osd1/current/2.0_head/ MODIFY 200.00000001__head_06E5F474__2
>
> /var/local/osd1/current/2.0_head/ CLOSE_WRITE,CLOSE
> 200.00000001__head_06E5F474__2
>
>
> May you please help me understand this name 200.00000001__head_06E5F474__2
>
>
> Thanks
>
> Mudit
>
>
> On Sun, Feb 1, 2015 at 10:35 PM, Sage Weil <sage@xxxxxxxxxxxx> wrote:
>
> It's inode number (in hex), then ".", then block number (in
> hex). You can get the ino of a file with stat.
>
> sage
>
>
>
> On February 1, 2015 5:08:18 PM GMT+01:00, Mudit Verma
> <mudit.f2004912@xxxxxxxxx> wrote:
> Hi All,
> CEPHFS - Given a file name, how can one determine the exact
> location and the name of the objects on OSDs.
>
> So far I could understand that the objects data is stored in
> .../current dir in OSDs, but what naming convention do they
> use?
>
> Many thanks in advance
>
> Thanks
> Mudit
>
> ____________________________________________________________________________
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> ceph-users@xxxxxxxxxxxxxx
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
>
> --
> Sent from Kaiten Mail. Please excuse my brevity.
>
>
>
>
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