[3436] in Release_7.7_team
NFS rsize and wsize defaults
daemon@ATHENA.MIT.EDU (Bill Cattey)
Tue Aug 27 15:38:27 2002
From: Bill Cattey <wdc@MIT.EDU>
To: release-team@mit.edu
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Date: 27 Aug 2002 15:38:24 -0400
Message-Id: <1030477104.26789.113.camel@tokata.mit.edu>
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In the early days of attach, MIT Net had routers and gateways with an
MTU (Maximum Transmission Unit or packet size) of 1500 bytes. To
prevent lossage from buggy fragmentation/reassembly code, attach was set
to crowbar NFS filesystems to rsize/wsize of 1024 so that each NFS UDP
datagram would fit in a single MTU through the gateways.
In the 15 years since that default was established, MIT Net has changed
just a little bit.
I propose that we remove that default and let rsize and wsize be
unspecified so that the OS running NFS can use its own best judgement
about rsize and wsize.
I'm reasonably sure this IS an issue, because I just mounted bitbucket
and the NFS filesystem was mount'ed with rsize and wsizeof 1024.
-wdc
