The computers at Hat Creek haved moved to the University
of Illinois network domain, i.e., will have their network names
changed from xxx.berkeley.edu to xxx.astro.uiuc.edu.
For now, the web server responds to both bima2.berkeley.edu and
bima2.astro.uiuc.edu. If it is possible to permanently keep both server names
usable, we may do so.
The computers affected are
| Old Name | New Name |
| hat.berkeley.edu | hat.astro.uiuc.edu |
| bima.berkeley.edu | bima.astro.uiuc.edu |
| bima2.berkeley.edu | bima2.astro.uiuc.edu |
| bima6.berkeley.edu | bima6.astro.uiuc.edu |
The following is a redacted (to use the en vogue term) e-mail from Dick Crutcher describing the changeover:
From crutcher@astro.uiuc.edu
For the past few years the T1 line between Berkeley and Hat Creek
has been paid by an NSF Advanced Scientific Computing grant
That grant officially expired 30 Sept 1998, but has been
extended until the new node becomes operational.
As part of the renewal of the NCSA NSF support, it was arranged a
subcontract from the Illinois NCSA NSF grant to NRAO for joint
support of AIPS++ development. Part of those funds will be used
to put NCSA and Hat Creek on the NRAO intranet, with a direct
connection between Hat Creek and Illinois (and between Illinois
and Socorro). The network speed on both links will be a guaranteed
minimum of 512 kb/s, with a peak of 1024 kb/s (the node at Illinois
will handle a peak of 1024 kb/s; if Socorro and Hat Creek need bandwidth
simultaneously, each will get half the total; otherwise, one site can
get the full bandwidth). This compares with the present peak of
1536 kb/s on the T1 line between Hat Creek and Berkeley,
with a guaranteed minimum of 0 from Berkeley to the rest of the world
over the Internet. The result will be a significant improvement for
data transfer between Hat Creek and Illinois, probably no change for
internet traffic between Maryland and Hat Creek, and probably a mild
decrease in performance between Berkeley and Hat Creek (since traffic
will have to come first to Illinois over the public Internet).
The node at Illinois has been installed, and traffic is beginning
between Illinois and Socorro. The node at Hat Creek was scheduled
to have been installed by now, but has been delayed because of a labor dispute
at USWest.
The plan is that the computers at Hat Creek will move to the
University of Illinois network domain, i.e., will have their network
names changed from xxx.berkeley.edu to xxx.uiuc.edu. It is
technically straightforward to have the University of Illinois
provide internet service to Hat Creek. As soon as possible, the UIUC
internet addresses will be assigned to Hat Creek and Wilson Hoffman
can proceed with the timely changeover.
Date: Wed, 23 Sep 1998 12:22:44 -0500
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