Hi Tao, inline
----- Original Message ----- > From: "Tao CHEN" <sebastien.che...@gmail.com> > To: nfs-ganesha-devel@lists.sourceforge.net > Sent: Monday, January 2, 2017 11:08:11 PM > Subject: [Nfs-ganesha-devel] nfs over rgw - new bucket not been added to > mdcache > > > > Hi all, > I'm using nfs-ganesha v2.4 to build a nfs over rgw with Ceph v11.0.2. I did > some experiments and I faced something that I can't understand: > > 1. I tried to create a new bucket in ceph cluster with s3cmd and the new > bucket had been successfully created. However, I couldn't see the new bucket > in the mount point, but I can still access to this bucket in the mount > point. There was a bug with this behavior in early Jewel, but it should be fixed, so I wouldn't expect this, I'll try to verify on master. > > 2. I mounted 2 points(nfs-client A and nfs-client B). When I created a new > bucket in nfs-client A, the new bucket showed up in the nfs-client B with a > short delay. And the new bucket had been successfully created in the > backend(ceph cluster) too. good...nb, we're not doing rgw-side invalidates of ganesha yet, which I think is the root cause of the different issues you're seeing here. The design goals for rgw + nfs do date are to have a more relaxed namespace consistency than traditional nfs, but clearly we want to be "eventually consistent." :) You can potentially address this issue in the short run by shortening ganesha's cache expiration time. > > I check the log file and the source code, and I found that, when we created a > new bucket in ceph cluster, nfs-ganesha sync FSAL but not MDCache. So in the > mount point we cannot see the new bucket. However, if we create a new bucket > in nfs-client, nfs-ganesha will sync both FSAL and MDCache. > > It doesn't seem like a bug, can somebody tell me why nfs-ganesha work so? > Would it cost too much if we sync both FSAL and MDCache if we update ceph > cluster? > > Thanks for your attention! -- > > > Tao CHEN > Regards, Matt > > > > Élève ingénieur Système Réseaux et Télécommunications > > > Université de Technologie de Troyes(UTT) > > > Email: sebastien.che...@gmail.com > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Nfs-ganesha-devel mailing list > Nfs-ganesha-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel > -- Matt Benjamin Red Hat, Inc. 315 West Huron Street, Suite 140A Ann Arbor, Michigan 48103 http://www.redhat.com/en/technologies/storage tel. 734-821-5101 fax. 734-769-8938 cel. 734-216-5309 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Nfs-ganesha-devel mailing list Nfs-ganesha-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel
