home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
InfoMagic Standards 1994 January
/
InfoMagic Standards - January 1994.iso
/
inet
/
ietf
/
dfs
/
90may.min
< prev
next >
Wrap
Text File
|
1993-02-17
|
3KB
|
94 lines
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