On Tuesday, March 5, 2013 at 10:08 AM, Wido den Hollander wrote: > 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?
Not at present. I think there are some tickets related to this in the tracker as feature requests, but CephFS needs more groundwork about multi-tenancy in general before we can do reasonable planning around a robust user quota feature. (Near-real-time hacks are possible now based around the rstats infrastructure and I believe somebody has built them, though I've never seen them myself.) -Greg -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
