The hash of the filename is ($inode.$block) is 4BC00833, and the pg id is a slightly weird function of those bits. sage On Tue, 3 Feb 2015, Mudit Verma wrote: > 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 > > > >___________________________________________________________________________ > _ > > ceph-users mailing list > > 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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