On 03/05/2013 06:03 PM, Greg Farnum wrote:
This is a companion discussion to the blog post at
http://ceph.com/dev-notes/cephfs-mds-status-discussion/ — go read that!
The short and slightly alternate version: I spent most of about two weeks
working on bugs related to snapshots in the MDS, and we started realizing that
we could probably do our first supported release of CephFS and the related
infrastructure much sooner if we didn't need to support all of the whizbang
features. (This isn't to say that the base feature set is stable now, but it's
much closer than when you turn on some of the other things.) I'd like to get
feedback from you in the community on what minimum supported feature set would
prompt or allow you to start using CephFS in real environments — not what you'd
*like* to see, but what you *need* to see. This will allow us at Inktank to
prioritize more effectively and hopefully get out a supported release much more
quickly! :)
The current proposed feature set is basically what's left over after we've
trimmed off everything we can think to split off, but if any of the proposed
included features are also particularly important or don't matter, be sure to
mention them (NFS export in particular — it works right now but isn't in great
shape due to NFS filehandle caching).
Great news! Although RBD and RADOS itself are already great, a lot of
applications would still require a shared filesystem.
Think about a (Cloud|Open)Stack environment with thousands of instances
running but also need some form of shared filesystem.
One thing I'm missing though is user-quotas, have they been discussed at
all and what would the work to implement those involve?
I know it would require a lot more tracking per file so it's not that
easy and would certainly not make it into a first release, but are they
on the roadmap at all?
Thanks,
-Greg
Software Engineer #42 @ http://inktank.com | http://ceph.com
^ awesome title ;)
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