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Re: CONDUIT latencies--My two cents

Robert,

Thanks for recommending Sun Solaris 7 x86, I have telling users that there
is memory problem with mmap on Linux. The only solution I have for the
Linux users is to add at least 750 megabytes RAM for the Linux systems.

Robb...


On Fri, 16 Jul 1999, Robert R. Mullenax wrote:

> 
> We had a similar problem with the NMC2 feed when we tried it
> this spring.  We were feeding from U. of Arizona and even though
> the connection to them was not great it was acceptable. It turns
> out that by the time the data filtered to them it was getting
> old and the last leg to us sent it over the 3600 sec mark.
> My feeling is that if you were really far from the main feed
> like we were there is no way to receive all of the data
> especially the large sets like the AVN/MRF NMC2 feed.
> 
> On another note..just my two cents.  I would highly recommend
> considering Sun Solaris 7 x86 for those having problems with Linux.  It is
> free except for shipping for education/non-commercial use.
> We have been running the full NOAAPORT feed with all the GEMPAK
> and McIDAS decoders (except NIDS and NLDN) for over a year plus
> serves as the McIDAS and GEMPAK workstation.
> It also serves as a web server and generates images(CGI scrips) for
> our use from remote sites.  The speed at which it generates
> the charts is great.  I have never had any trouble with,
> and this is with IDE drives(400Mhz PII, 256 MB RAM).  I have no doubt that
> in terms of raw performance Linux is faster, but I have had no complaints
> at all.  Never a crash, or anything strange going on with the
> LDM(except things I caused, of course). 
> 
> Robert Mullenax
>     
> 
> 
> 

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