On Mon, Dec 7, 2015 at 9:13 AM, Wuxiangwei <wuxiangwei@xxxxxxx> wrote: > > it looks simple if everything stays as its default value. However, we do want to change the stripe unit size and stripe count to achieve possible higher performance. If so, it would be too troublesome to manually do the calculation every time when we want to locate a given offset(and maybe a certain interval). The 'cephfs map' and 'cephfs show_location' can provide good information as we want, but sadly not for ceph-fuse. That's why I ask for a similar tool. If you are interested in writing this, you could look at Client::get_file_stripe_address and Striper::file_to_extents. Currently in libcephfs we expose methods for getting the OSDs relevant to a particular file, in case something like hadoop wants to exploit locality, but we don't expose the intermediate knowledge of the object names. I am curious about why you need this? John _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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