On Tue, 5 Aug 2014, Craig Lewis wrote:
> There currently isn't a backup tool for CephFS.  CephFS is a POSIX
> filesystem, so your normal tools should work.  It's a really large POSIX
> filesystem though, so normal tools may not scale well.

Note that CephFS does have one feature that should make efficient 
incremental backup possible: there is an 'rctime' (recursive ctime) 
attribute on all directories that will let you skip entire directory trees 
that haven't seen a modification since the last backup pass.  This is a 
ceph specific feature (nobody else has anything like it that I know of), 
so I suspect getting it supported in tools like rsync will be challenging, 
but I suspect a pretty simple tool can be constructed that makes this work 
and can be composed in a unix-ey way with other tools into a full 
solution...

sage




> 
> There's no generic replication tool for RADOS itself.  If you're using
> librados directly, you'll have to build your own replication system.
> 
> 
> 
> On Mon, Aug 4, 2014 at 10:16 AM, Patrick McGarry <patr...@inktank.com>
> wrote:
>       This is probably a question best asked on the ceph-user list.  I
>       have
>       added it here.
> 
> 
>       Best Regards,
> 
>       Patrick McGarry
>       Director Ceph Community || Red Hat
>       http://ceph.com  ||  http://community.redhat.com
>       @scuttlemonkey || @ceph
> 
> 
>       On Mon, Aug 4, 2014 at 2:17 AM, Santhosh Fernandes
>       <santhosh.fernan...@gmail.com> wrote:
>       > Hi all,
>       >
>       > Do we have continuous access or remote replication  feature in
>       ceph ? When
>       > we can get this functionality  implemented?
>       >
>       > Thank you.
>       >
>       > Regards,
>       > Santhosh
>       >
>       >
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> 
> 
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