On Thursday 19 April 2007 06:05:38 Steve Burling wrote: > --On April 18, 2007 9:55:48 PM -0500 Brad Knowles <[EMAIL PROTECTED]> > > wrote: > > 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!! David ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.027.htp
