[Mailman-Users] Managing lists as a non-root/Mailman user
david at vizion2000.net
Thu Apr 19 15:41:41 CEST 2007
On Thursday 19 April 2007 06:05:38 Steve Burling wrote:
> --On April 18, 2007 9:55:48 PM -0500 Brad Knowles <brad at shub-internet.org>
> > In the nearly twenty years I've been doing this sort of stuff, I don't
> > think I've ever ran into a single NFS environment that I would call
> > "well-managed". Some were not as badly managed as others, but they all
> > had major problems.
> To which I reply:
> That's to bad. In the nearly thirty years that I've been doing this sort
> of stuff, I've come across a few. I work in (and help manage) one now.
well if I remember correctly NFS was developed by Sun but not first introduced
fully until very early spring of 1989 (RFC 1094). However the degree of time
over which any one of us has been associated, to one degree or another, with
its use, is IMHO, far less significant than the facts that have emerged in
practice. The evidence does seem to point pretty conclusively towards the
notion that what might be interpreted as a "well-managed" environment depends
very heavily upon flow-control conditions. This is a factor that is not under
the total control of administrators.
NFS dynamics over flow-controlled wide area networks by Chang, Morris & Kung
of Harvard ( INFOCOM '97) is recomended reading. The evidence clearly shows
that NFS over TCP works badly with small packets but is pretty much OK over
ATM WANS if the flow control keeps the cell loss rate under 1%.
NFS is like anything else - it reflects not how long we have been doing it for
but how well we perform in the currently prevailing conditions!!
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