Hi, I have created a rbd and mounted it and started using it as a raw device. Now in ceph every data is replicated. Does ceph replicate each and every file I created in the rbd or does it replicate the rbd image only? Also is there any command to find out where these replicas are stored? Thanks and Regards, Kiriti Sent from my Windows Phone From: Ilya Dryomov Sent: 19-01-2014 10:32 PM To: kiriti krishna Cc: ceph-users@xxxxxxxx Subject: Re: writing data to ceph rbd On Sun, Jan 19, 2014 at 2:32 PM, kiriti krishna <mvsaikrishnakiriti@xxxxxxxxx> wrote: > Hi, > I have successfully installed ceph, and created and configured ceph > rados, ceph rbd and cephfs. Now I want to want to write data to ceph rbd. I > have created ceph rbd write on copy clone but I'm not finding any info > regarding how to write to ceph rbd. Can you please help me with any > reference to how to write data to rbd. Also where do all of these rbd snap > shots and their clones will be stored. > Thanks and Regards, > Kiriti rbd is short for block device, you have to "map" an rbd image to a block device in order to use it (read or write from it). $ rbd create --size <size_in_mb> <image_name> $ rbd map <image_name> will map image_name image to a /dev/rbd<id> block device. You can then use this block device as any other block device on your system: create a filesystem on it, use it as a raw block device, etc. $ rbd showmapped will give you the /dev/rbd<id> id. The other option is to use fuse. See documentation links below for details. http://ceph.com/docs/master/rbd/rbd-ko/ - rbd map http://ceph.com/docs/master/man/8/rbd-fuse/ - fuse http://ceph.com/docs/master/rbd/rbd/ - everything rbd Thanks, Ilya _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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