On Tuesday 28 August 2012 you wrote: > On Tue, Aug 28, 2012 at 11:51 AM, Dieter Kasper <d.kas...@kabelmail.de> wrote: > > Hi Ross, > > > > focusing on core stability and feature expansion for RBD was the right > > appoach in the past and I feel you have reached an adequate maturity > > level here. > > > > Performance enhancements - especially to reduce the latency of a single > > IO / increase IOPS - and a stronger engagement on the CephFS client would > > be very much appreciated. A stable and fast CephFS client would allow an > > efficient integration with - (clustered) NFS (v3 and v4) > > - (clustered) Samba v4 > > +1 to CephFS being worked on. Things like the multi-mds being improved > upon would be amazing.
Stable CephFS is what we need, too - many concurrent write accesses from multiple clients with a real file system underneath. However, most stability problems we have had so far were crashes in the daemons, not the Linux kernel. Great for me would be some solution to what we call the Domino effect - one daemon crashes, the next takes over, crashes at the same place (same data...), until the whole cluster is down. There will always be bugs, but they should not kill the whole cluster. In our tests, single MDS was no real bottleneck, it was only lacking stability. I have not tested the newest releases, so it might be better now. Improved performance with many small files being written concurrently would be great, but CephFS has been getting significantly faster over the last year and performance is being worked on all the time. Amon Ott -- Dr. Amon Ott m-privacy GmbH Tel: +49 30 24342334 Am Köllnischen Park 1 Fax: +49 30 99296856 10179 Berlin http://www.m-privacy.de Amtsgericht Charlottenburg, HRB 84946 Geschäftsführer: Dipl.-Kfm. Holger Maczkowsky, Roman Maczkowsky GnuPG-Key-ID: 0x2DD3A649 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
