We've discussed the order of work (you can see my recent Ceph blog post on the subject; though it's subject to revision) but haven't committed to any dates at this time. Sorry. :( -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com On Wed, Apr 10, 2013 at 12:43 PM, Maik Kulbe <info@xxxxxxxxxxxxxxxxxxxxxxxx> wrote: > So in fact, there is no other solution than normal file-based backups and > hoping the MDS won't crash? > > Are there any plans which release will contain a stable CephFS/MDS? > >> Well, if you've made changes to your data which impacted the metadata, >> and then you restore to a backup of the metadata pool, but not the >> data, then what's there isn't what CephFS thinks is there. Which would >> be confusing for all the same reasons that it is in a local >> filesystem. You could construct a use case and a backup system which >> would produce a working system, but I don't think it'd be very useful >> for most applications. >> -Greg >> Software Engineer #42 @ http://inktank.com | http://ceph.com >> >> >> On Wed, Apr 10, 2013 at 12:13 PM, Maik Kulbe >> wrote: >> > I think going backwards in time would be, what a backup is for, isn't >> it? ;) >> > >> > My question really just is, if it is possible, to back it up. It just >> really >> > stinks to completely rebuild the cluster and re-import all the data >> > everytime I make some small mistake in the environment and the >> metadata >> > backup would really help to save some time here. >> > >> >> If you were to do that you'd be going backwards in time with your >> >> metadata, so — not really. CephFS is not generally >> production-ready >> >> at >> >> this time, but we welcome bug reports! >> >> -Greg >> >> Software Engineer #42 @ http://inktank.com | http://ceph.com >> >> >> >> >> >> On Mon, Apr 8, 2013 at 12:52 PM, Maik Kulbe >> >> wrote: >> >> > Hi, >> >> > >> >> > I'm currently testing Ceph with the POSIX fs at work as a fs >> cluster. >> >> So far >> >> > I've managed to cripple the test environment three or four times >> be >> >> > unintendently crashing the MDS(1 active, 2 hot-standby). It seems >> to >> >> me the >> >> > MDS are pretty sensitive to all kinds of environmental changes and >> so >> >> to use >> >> > this I really need a backup solution for the Metadata. >> >> > >> >> > I've seen that RADOS supports an export command and that this also >> >> works >> >> > with the MD pool. Now the question is - can I just export and in >> case >> >> I need >> >> > it re-import the exported metadata or are there problems with that? >> If >> >> so, >> >> > what would be a better way to handle this? >> >> > >> >> > Thanks in advance, >> >> > >> >> > Maik Kulbe >> >> > _______________________________________________ >> >> > ceph-users mailing list >> >> > ceph-users@xxxxxxxxxxxxxx >> >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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