[evla-sw-discuss] Central server

[Michael Rupen]

Hi Kevin,
   are you thinking of the 4-station PTC or the 10-station system or beyond?
In the long run it's not obvious to me that many of these files should reside 
on a single central file system, though initially this may be useful.

           Michael

On Tue, 6 May 2008, Kevin Ryan wrote:

> Hi gang,
>
> This is more of a James question but I think that many on this list
> might be interested in the outcome.
>
> Work on the WIDAR correlator TestExecutor software suite has gotten
> me thinking about how (or if) we will implement a 'Central Server'.
> We want configuration files (the ones that set up the various
> correlator modes), data output files such as those generated by the
> Station Boards during OTS testing, property files and the Java Web
> Start GUI application files all to reside on one central file system
> that is mounted by all processors in the correlator including each of
> the 256 CMIBs.  ... I think.
>
> Presently, the Java Web Start application files and the system
> property files reside on 'filehost'(?) at '/home/asg/www/widar'.
> This translates to the URL 'http://www.aoc.nrao.edu/asg/widar/' used
> by Java for access to these files.
>
> Also, presently, the CMIBs access a directory on 'cmibhost' (the CMIB
> bootserver in Bruce & Kevin's office) called '/opt/widar' where
> configuration files are kept for now.  When the system goes online
> there will be more than one CMIB bootserver which will cause
> confusion since there will no longer be a single central '/opt/widar'
> directory.
>
> It would be nice if we could combine the '/home/asg' and 'opt/widar'
> areas on 'filehost' and 'cmibhost' into one area common to (and
> mounted on) all processors in the correlator.  This machine must also
> be a web server.
>
> I don't think this machine should be one of the online units like
> MCCC.  I don't even know if it has to reside in the correlator room,
> but keep in mind that there will be occasions where CMIBs will be
> writing output data products to it via NFS.
>
> Suggestions James or anyone?  Is this something that the mirrored (or
> whatever it's called) 'filehost' at the VLA could do?  Does the EVLA
> already have something like this running out there that we could share?
>
> Kevin
>
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