On Fri, 2017-05-19 at 11:55 +0530, Soumya Koduri wrote: > Hi, > > On 05/18/2017 08:04 PM, Yun-Chih Chen wrote: > > Hi, friends: > > > > I'm studying the affect of NFSv4 on Linux. As far as I know, NFS > > implemented in Linux kernel supports read delegation but not write > > delegation. I wonder if Ganesha implements write delegation? If yes, > > can it take effect if accessed by Linux NFS client? > > > > I use the following config file to observe delegation in Ganesha: > > > > EXPORT { > > Export_Id = 77; > > Path = /e; > > Pseudo = /e; > > Access_Type = RW; > > FSAL { > > Name = XFS; > > } > > > > Delegations = readwrite; > > } > > > > NFSV4 { > > Delegations = true; > > } > > > > However, I did not see any trace of delegation under various workloads > > (example: repeated read [1], repeated write [2]) using tools like > > nfstrace or tcpdump. When running in debug mode, I always got the > > following in the log file: > > > > ganesha.nfsd-8999[main] display_fsinfo :FSAL :DEBUG : delegations = 0 > > > > indicating that delegation was not on. > > Is there something wrong with my config file? Or any other clue > > regarding NFS delegation? Thanks ( ; > > AFAIK except for FSAL_GPFS, other FSALs do not have support for > delegations yet. Also after switching to new extended APIs > (>=nfs-ganesha-2.4), delegations are disabled. It needs some additional > work. We are planning to address it as part of adding this support for > FSAL_GLUSTER (hopefully in 2.6 release). WRT XFS, I am not sure if > anyone is actively looking at it. > > Thanks, > Soumya >
Hi Soumya, I just started looking at delegation support in ganesha (mostly with an eye toward plumbing in delegation support for Ceph). I think we probably need to rework the whole delegation interface (maybe even give it a dedicated FSAL op), and was wondering if you had started any work along those lines. Thanks, -- Jeff Layton <jlay...@redhat.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