CURRENT_MEETING_REPORT_ Reported by Peter Honeyman/ University of Michigan Minutes At this meeting, attention was focused on NFS. The consensus was that it will be most useful in the near term to draft a ``survival guide'' for NFS. The audience for this guide will be vendors and system administrators. Suggested recommendations were discussed. Items that can be addressed only by implementors are noted. Some items suggest coordination with the NOC tools. o Avoid packet retransmission - Soft mounts vs. hard mounts - Adjust timeout parameters to meet local conditions - Transaction ID caching (implementation) - Adaptive retransmission strategy (implementation) o Avoid IP fragmentation : Adjust read and write sizes to meet local conditions o Ensure reliable data transfer: Use UDP checksum for long-haul o Privacy issues - Reserved socket myth - Mutual distrust among client and server (implementation) - Periodic FSIRAND (NOC tools) - Setuid handling - IP address verification at mount time - IP address verification at access time (implementation) - Root and anonymous mapping - Generalized mapping (implementation) o System management - NFSSTAT and NFSWATCH (NOC tools) - SNMP for NFS (implementation) - Export controls - Cache timeout management Since Ethernet checksum can obviate UDP checksum, a suggestion was made that UDP checksum be a mount option. This may not be practical, since most NFS servers are running on an operating system for which UDP checksum is either always enabled or always disabled. The consensus seems to be that correctness is more important than performance. I.e., UDP checksum should always be enabled. It was reported that in some vendors' operating systems, it is impossible to turn on UDP checksum. There was further discussion of the protocol for Kerberos integration with NFS. 1 ATTENDEES David Burdelski daveb@ftp.com Andrew Cherenson arc@sgi.com Sailesh Chutani chutani@transarc.com Bruce Crabill bruce@umdd.umd.edu Peter DiCamillo smsmaint@brownvm.brown.edu Craig Everhart cfe@transarc.com Dennis Ferguson dennis@gw.ccie.utoronto.ca Fred Glover fglover@decvax.dec.com Olafur Gudmundson ocud@cs.umd.edu Peter Honeyman honey@citi.umich.edu Steve Hubert hubert@cac.washington.edu Tim Hunter thunter@allegum Steven Hunter hunter@ccc.mfecc.arpa Josh Littlefield jost@cayman.com Tony Mason mason@transarc.com Leo McLaughlin ljm@twg.com Greg Minshall minshall@kinetics.kinetics.com Jeffrey Mogul mogul@decwrl.dec.com Dan Nydick nydick@psc.edu Brad Parker brad@cayman.com Drew Perkins ddp@andrew.cmu.edu Joel Replogle replogle@ncsa.uiuc.edu Bob Sidebotham bobo@andrew.cmu.edu Ted Soo-Hoo soo-hoo@dj-rtp.dg.com Brad Strand bstrand@cray.com 2