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=============================================================================== Robb Kambic Unidata Program Center Software Engineer III Univ. Corp for Atmospheric Research address@hidden WWW: http://www.unidata.ucar.edu/ =============================================================================== ---------- Forwarded message ---------- Date: Wed, 23 Dec 1998 16:32:19 -0500 (EST) From: Tom McDermott <address@hidden> To: Robb Kambic <address@hidden> Subject: Re: 19981223: idd: delayed metars & NOAAPORT On Wed, 23 Dec 1998, Robb Kambic wrote: > That's a lot of disconnects. It's also the reason for the late data, > surprizing that your site is not loosing more data. Here's what I think > what is happening. Before, NOAAport Brockport was almost running close to > it's network capacity, now it's saturated. That's the reason for the > disconnect( time outs) and the LDM RECLASS statements. I would contact > your network people to see if they can arrange a solution and further > restrict the incoming data. You also could check the status of your > machine to see if it cpu loaded, disk loaded, etc. I suspected that network capacity might be the problem. I happen to know that our campus's bandwidth saturates at certain times. The last time I spoke with our network person, he said they were going to be installing a 2nd T1 line, but I don't know when. I think I can rule out cpu, disk as the problem. Vortex is a SparcStation-10 with dual 75-mhz cpus. The only time the loading spikes up is when certain of the gempak decoders startup or become active. The 'disk' the ldm data is written to is a partition striped over 6 physical drives. Anyways, nothing has changed recently to cause it except the switch to NOAAPORT. This would be consistent with your speculation of a borderline situation pushed way over the edge by NOAAPORT. In the meantime, I suppose the best thing we can do until we get more network capacity would be to keep the NOAAPORT filter in place? Tom ------------------------------------------------------------------------------ Tom McDermott Email: address@hidden System Administrator Phone: (716) 395-5718 Earth Sciences Dept. Fax: (716) 395-2416 SUNY College at Brockport