Re: cephfs usable or not?

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Hi Max,

I do use CephFS (Giant) in a production environment. It works really
well, but I have backups ready to use, just in case.

As Wido said, kernel version is not really relevant if you use ceph-fuse
(which I recommend over cephfs kernel, for stability and ease of upgrade
reasons).

However, I found ceph-mds memory usage hard to predict, and I had some
problems with that. At first it was undersized (16GB, for ~8M files /
dirs, and 1M inodes cached), but it worked well until I had a server
crash who did not recover (mds rejoin / rebuild) because of the lack of
memory. So I gave it 24GB memory + 24GB swap, no problem anymore.

-- 
Thomas Lemarchand
Cloud Solutions SAS - Responsable des systèmes d'information



On dim., 2014-12-28 at 14:12 +0100, Max Power wrote:
> Hi, my cluster setup would be much easier if I use cephfs on it (instead of a
> block device with ocfs2 or something else). But its said everywhere that it is
> not ready for production-use at this time. I wonder what this is all about?
> 
> Does it mean that there are a few features missing or is the code full of bugs?
> I want to use cephfs fuse drivers (v0.90) with a 3.18.1 kernel. Can I give my
> data to such a configuration without destroying? Or will there be tears and
> scrambled files? I heard that the fuse driver is more stable than the kernel
> driver?
> 
> It looks like we are getting closer to a v1.00 - will cephfs be production ready
> at this point? Is it possible to say "production ready" at any time anyway?
> _______________________________________________
> ceph-users mailing list
> ceph-users@xxxxxxxxxxxxxx
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> 


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