[1320] in SIPB-AFS-requests
Re: server migration
daemon@ATHENA.MIT.EDU (Greg Hudson)
Fri Apr 15 16:41:12 1994
To: sorokin@MIT.EDU
Cc: sipb-afsreq@MIT.EDU, charon-maintainers@MIT.EDU, rtfm-maintainers@MIT.EDU,
webmaster@MIT.EDU, usenet@MIT.EDU
In-Reply-To: Your message of Fri, 15 Apr 94 14:45:50 -0400.
<9404151845.AA05852@hope.MIT.EDU>
Date: Fri, 15 Apr 94 16:38:47 EDT
From: Greg Hudson <ghudson@MIT.EDU>
Okay, revised situation:
We're probably going to get to keep yaz. Jessie and I are still
making sure it'll be okay to put it into production as a general SIPB
server, but we don't anticipate any problems. This means we'll have a
DS5000/25 to use for discuss, NFS, and maybe dialup and
experimentation with new services. (The need for NFS service will go
down a lot when we have AFS for Linux, in particular.)
We have seven machines, three SS20s and four DS5000s. These will
break down as follows:
AFS: Two maxines
News: One SS20 and one other machine
RTFM: One SS20
Discuss, NFS: One Maxine
WWW: One other machine
Several other services such as bitnet and gopher will probably run on
the same machine as discuss or WWW.
(I say "these will break down as follows" because I don't see much
momentum behind any other allocation scheme. If someone really wants
to see a different scheme used, now is the time to argue.) There is a
question as to whether beacon or WWW will get the SS20 slot (the other
will get a Maxine with 40MB of memory); on the one side there is that
* Beacon is hosed.
On the other side, there is that
* The web server is hosed.
This is a difficult problem to resolve. Our current implementation of
the WWW server is memory bound, and a Maxine can only hold 40MB of
memory; beacon, on the other hand, is disk bound (it doesn't use a lot
of memory), and making it a Maxine with 40MB of memory won't help it
any. Neither machine really needs to be an SS20, but neither is
likely to be happy for all of next year as a Maxine (unless web usage
levels off, and we can't predict that).
Currently, I favor using the SS20 for beacon. The Web server should
do significantly better on a Maxine with 40MB of memory than it does
now on charon, and there's a lot more room for improvement in Plexus
than there is in inn's transport facilities. Also, having the same
platform for both news servers is a big win.
--GBH
