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Re: 19990422: LDM on SunOS 4.1.x

On Thu, 22 Apr 1999, Unidata Support wrote:

> 
> ------- Forwarded Message
> 
> >To: address@hidden
> >From: Carl Sinclair <address@hidden>
> >Subject: LDM on SunOS 4.1.x
> >Organization: .
> >Keywords: 199904221538.JAA14499
> 
> 
> I was wondering if you could tell me some of the specific problems that LDM 
> had 
> when running on SunOS 4.1.x.  I've seen in some of the emails that you've 
> answered that there are just problems that can't be avoided because of the 
> operating system.  We (NSSL) are looking at putting LDM on a Sparc 5 
> workstation 
> with 32M of ram.

Hiya,

32M ram is small, it should at least be 64. The machine will work fine if
you are only going to get a subset of the NOAAport(AWIPS) data. Also, It
will be easy to overburden the cpu if one plans on running any decoders. 

  The machine is a realtime data machine, so its reliability is 
> a big key issue.  The realtime software creates a circular buffer that 
> resides 
> in 16M of the memory. 

We recommend 64M just for the LDM, adding your 16M buffer will make
configuration harder.  

 This brings up a question of the Perl scripts that LDM 
> uses.  Do they use alot of memory or cpu resources?  

No, they only administor the ldm. One shot deals low usuage of memory

Anything you can tell me 
> about the SunOS 4.1.x problems and their frequency would help me out alot.  

Most of our sites use Solaris OS, I believe that SunOS systems have higher
configuration/maintenance. I haven't answered any SunOS questions in
awhile so I'm not sure what problems you will run into. I do know that it
needs to be up to date in os patches.  The
preinstall/install/configuration instructions are on the LDM home page on
the web. We official support SunOS, but as I mentioned before your
installation would have to be scaled down because of limited resources.


Robb...

> Thanks for your time.
> 
> 
> Carl Sinclair
> RIDDS Systems Analyst
> NSSL -- Norman, OK
> address@hidden
> 
> 
> ------- End of Forwarded Message
> 

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================