> Op 4 augustus 2016 om 18:17 schreef Shain Miley <smi...@npr.org>: > > > Hello, > > I am thinking about setting up a second Ceph cluster in the near future, > and I was wondering about the current status of rbd-mirror. >
I don't have all the answers, but I will give it a try. > 1)is it production ready at this point? > Yes, but rbd-mirror is a single process at the moment. So mirroring a very large number of images might become a bottleneck at some point. I don't know where that point it. > 2)can it be used when you have a cluster with existing data in order to > replicate onto a new cluster? > iirc, images need the fast-diff feature enable to be able to support mirroring, more on that in the docs: http://docs.ceph.com/docs/master/rbd/rbd-mirroring/ The problem is, if you have old RBD images, maybe even format 1, you will not be able to mirror those. Some rbd format 2 images neither, since they don't have the journal and don't have the fast-diff. So per image it will depend if the mirroring is able to run. > 3)we have some rather large rbd images at this point..several in the > 90TB range...would there be any concern using rbd-mirror given the size > of our images? > The initial sync might be slow and block the single rbd-mirror process. Afterwards, if fast-diff is enabled it shouldn't be a real problem. Wido > Thanks, > > Shain > > -- > NPR | Shain Miley | Manager of Infrastructure, Digital Media | > smi...@npr.org | 202.513.3649 > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
