An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140527/d592ada2/attachment.htm> -------------- next part -------------- Shashank, I will just show you how to get unique object id in cephfs, this maybe kind of help to you in rgw. I mount the kernel client in /cephdir , and version is ceph-v0.80. 1. list inodes of all files (inode is decimal) root at ceph0:~# ls -i /cephdir 1099511627784 ceph-configure.sh 1099511627776 uuid 1099511627780 xx decimal ----> hexdecimal 1099511627776 100000000000 1099511627780 100000000004 1099511627784 100000000008 2. list all objects in data (in hexdecimal) for cephfs, all file objects are in pool data root at ceph0:~# rados -p data ls - 10000000000.00000000 10000000008.00000000 10000000004.00000000 object id format is : <inode_no>.<object_no> If file more than size of object(usually 4194304 or 4MB), file will be split into pieces of objects, object id likes this: 10000000000.00000000, 10000000000.00000001, 10000000000.00000002 , ...... file oid mapping object -> file 10000000000.00000000 -> uuid 10000000008.00000000 -> ceph-configure.sh 10000000004.00000000 -> xx 3. to comfirm file content take /cephdir/uuid for example get content of file: root at ceph0:~# cat /cephdir/uuid befbb574-e1a9-11e3-afed-a0481c7c0900 get content of object: root at ceph0:~# rados -p data get 10000000000.00000000 - befbb574-e1a9-11e3-afed-a0481c7c0900 object 10000000000.00000000 's content is the same as file /cephdir/uuid, so, 10000000000.00000000 is the unique id of /cephdir/uuid (its size is 37 < 4914304, so there is only a object) rgw 's data pool maybe the same as cephfs min chen
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