[16526] in Athena Bugs
Re: NFS parameters in attach.conf
daemon@ATHENA.MIT.EDU (Greg Hudson)
Thu Dec 3 12:08:51 1998
To: "Thomas H. Grayson" <thg@MIT.EDU>
Cc: bugs@MIT.EDU, network@MIT.EDU, f_l@MIT.EDU, karen@MIT.EDU, jf@MIT.EDU,
phils@MIT.EDU
In-Reply-To: Your message of "Wed, 02 Dec 1998 17:36:25 EST."
<199812022236.RAA22057@m1-115-7.mit.edu>
Date: Thu, 03 Dec 1998 12:08:48 EST
From: Greg Hudson <ghudson@MIT.EDU>
I believe the rsize and wsize paramters were set that way, ages ago,
to avoid transmitting IP packets larger than the ethernet MTU (~1500
bytes).
I think it's probably a mistake for attach to override the system
defaults for NFS mounts. I will submit a patch to get rid of these
options and let the system's NFS client decide what buffer sizes to
use. However, these options do control how a large number of machines
do the vast majority of their NFS mounts; the network group may
express an objection to having them send packets which the routers
will have to fragment.
> The 'attach' command silently ignores these switches.
attach.conf settings override command-line settings of NFS flags for
security reasons. (Such is my understanding, though it's been a while
since I looked at the code.)
