NOAAPort latency followup.

• To: ldm-users@xxxxxxxxxxxxxxxx
• Subject: NOAAPort latency followup.
• From: Stonie R. Cooper [mailto:stonie.cooper@xxxxxxxxxxxxxxxxx]
• Date: Fri, 21 Jun 2002 12:35:01 -0500

Of course..and I should have mentioned this..
thanks to Sun, Linux would be the only OS
that you could get hardware support for.  So 
the total solution really is OS dependent.

-----Original Message-----
Sent: Friday, June 21, 2002 11:40 AM


By all means this is wonderful.  It was really becoming
a problem.  Although to be fair, it is really OS independent
as Solaris Intel, SCO, BSD..etc would have produced the
same result.  The real key lies in the x86 hardware.
I am glad that NWS are recognizing that the reliability
gap is now closed between x86 boxes and very expensive
RISC/MIPS systems if you stick to high-quality, high end
components. 

I lament everyday how slow our even fairly recent Sun
systems are in comparison to our Solaris Intel Dell
boxes.



-----Original Message-----
Sent: Friday, June 21, 2002 9:02 AM


As a followup to last week's switch over to Linux SBN uplink machines and 
latency issues for NOAAPort and NOAAPort dependent systems:

Time on Queue Statistics - Units are in seconds, for NCF.
-----------------------------
Channel                  Max     Average
-----------------------------
GOESEast Queue  102     40
GOESWest Queue  12      4
NWSTG Queue             45      1
DCP Queue               49      1
-----------------------------

These are the "fastest" times (lowest latency) that I have seen on NOAAPort.

The massive improvement with a Linux solution should benefit us all . . .
and 
kudos should go to NOAA for having the foresight to implement a technically 
and economically better SBN uplink facility.  After last week's latency 
issues - rooted on the old HP-RT systems and upstream facilities from the
NCF 
- this is a pleasant come-around.
-- 
Stonie R. Cooper
Planetary Data, Incorporated
ph. (402) 782-6611