On Mon, Apr 01, 2019 at 12:21:49PM -0400, Bradley C. Kuszmaul wrote: > Hi, I'm the architect for Oracle's File Storage Service. FSS is > basically a big scalable NFS server that runs in Oracle's cloud. > > Our metadata operations have higher latency than a vanilla NFS > server (e.g., a Linux NFS server serving a XFS stored on a block > device), and we suspect that directory delegations would make a big > performance improvement. > > I understand, however, that essentially no one implements directory > delegations. > > Can anyone fill me in on the current thinking of the future of > support for directory delegations in the Linux NFS client? Maybe somebody else will speak up, but I don't know of any effort to implement directory delegations. What metadata operations specifically are you worried about? The directory delegations that are specified in RFC 5661 are read-only. Which might explain some of the lack of interest. But there may be other steps that we could take to improve matters. --b.
