home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.protocols.nfs:1927 comp.sys.sun.hardware:3489
- Path: sparky!uunet!gatech!destroyer!caen!spool.mu.edu!news.cs.indiana.edu!umn.edu!lynx!zia.aoc.nrao.edu!rmilner
- From: rmilner@zia.aoc.nrao.edu (Ruth Milner)
- Newsgroups: comp.protocols.nfs,comp.sys.sun.hardware
- Subject: Re: NFS I/O Ops/seconds
- Message-ID: <1992Jul22.184547.759@zia.aoc.nrao.edu>
- Date: 22 Jul 92 18:45:47 GMT
- Article-I.D.: zia.1992Jul22.184547.759
- References: <1992Jul22.061146.15641@u.washington.edu> <1992Jul22.122659.22219@afterlife.ncsc.mil>
- Reply-To: rmilner@zia.aoc.nrao.edu (Ruth Milner)
- Organization: National Radio Astronomy Observatory, Socorro NM
- Lines: 46
-
- In article <1992Jul22.122659.22219@afterlife.ncsc.mil> dpkemp@afterlife.ncsc.mil (David P. Kemp) writes:
- >In article <1992Jul22.061146.15641@u.washington.edu> kint@rio.engr.washington.edu (Rick Kint) writes:
- >>
- >> We're buying a Sun to serve as an NFS server in one of our departments.
- >>The Sun rep commented that a typical Ethernet allows 300 NFS ops per second,
- >>so if you're on a single wire any server bandwidth beyond that is wasted.
-
- > Ethernet = 10 Mbit/sec
- > /8 = 1.25 Mbyte/sec
- > /8192 = 152 Read or Write ops/sec.
- >
- >I guess the Sun guy must have been using a mix that wasn't too heavily
- >into reads or writes! :-).
-
- Like most people. If you check your server with "nfsstat -s", you'll find
- that the majority of NFS requests are things like getattr and lookup, which
- do not need 8KB (only traffic containing actual disk data is that size). On
- our Auspex, these two operations alone account for 50% of all NFS requests.
- Reads are 17% and writes 19% of the mix.
-
- Using etherfind, I see the following sorts of things:
-
- client2% etherfind -i le0 -src server
- icmp type
- lnth proto source destination src port dst port
-
- 138 udp server client1 2049 1019
- 138 udp server client1 2049 1019
- 138 udp server client2 2049 1021
- 138 udp server client2 2049 1021
- 138 udp server client2 2049 1021
- 138 udp server client2 2049 1021
- 138 udp server client3 2049 1020
- 138 udp server client4 2049 1019
- 86 udp server client4 2049 1019
- 138 udp server client4 2049 1019
- 170 udp server client4 2049 1019
- 138 udp server client5 2049 1021
- 138 udp server client3 2049 1020
- 138 udp server client3 2049 1020
- 138 udp server client3 2049 1020
-
- The source port number of 2049 indicates NFS responses.
- --
- Ruth Milner NRAO/VLA Socorro NM
- Computing Division Head rmilner@zia.aoc.nrao.edu
-