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>From: "Arthur A. Person" <address@hidden> >Organization: Penn State >Keywords: 200110061836.f96IaT125601 IDD Art, >Our latencies have quickly popped back up to about 55 minutes now from >motherlode. SSEC NEXRAD is still running within seconds. I'm working >with our networking people now to see if they can discover anything. We see a jump in traceroute times at our abilene connection right at the moment, but I don't know if this is enough to slow the delivery from motherlode to downstream sites to the extent you are seeing: motherlode.ucar.edu% traceroute sunny.atmos.washington.edu traceroute to sunny.atmos.washington.edu (128.95.89.38), 30 hops max, 40 byte packets 1 mlra-n13 (128.117.13.253) 0.511 ms 0.542 ms 0.310 ms 2 vbnsr-n2 (128.117.2.252) 0.463 ms 0.591 ms 0.335 ms 3 internetr-n243-104 (128.117.243.106) 1.107 ms 1.042 ms 0.873 ms 4 denv-abilene (128.117.243.126) 2.196 ms 2.739 ms 2.150 ms 5 sttl-dnvr.abilene.ucaid.edu (198.32.8.49) 29.941 ms 30.317 ms 33.031 ms 6 hnsp1-wes-S5-0-0.pnw-gigapop.net (198.48.91.77) 30.270 ms 30.288 ms 29.983 ms 7 uwbr1-GE5-0.cac.washington.edu (198.107.151.51) 29.922 ms 29.917 ms 30.412 ms 8 dustbuster-V49.cac.washington.edu (140.142.150.2) 30.968 ms 30.772 ms 30.594 ms 9 sunny.atmos.washington.edu (128.95.89.38) 30.325 ms 30.527 ms 30.436 ms I am CCing this to Anne for further comment/action. Tom >On Mon, 8 Oct 2001, Arthur A. Person wrote: > >> On Sun, 7 Oct 2001, Unidata Support wrote: >> >> > >From: "Arthur A. Person" <address@hidden> >> > >Organization: UCAR/Unidata >> > >Keywords: 200110061836.f96IaT125601 >> > >> > Art, >> > >> > Sorry I didn't see this before this morning. >> > >> > >Our feed from motherlode is about 40 minutes behind... this has been >> > >happening for several hours according to our users. Is motherlode having >> > >a problem, or some networking issue? Our feed from SSEC and WSI (for >> > >example) are on-time. >> > >> > 'traceroute's from motherlode to three different machines show a significa > nt >> > increase at the abilene connection in Denver, but these are not (by an >> > order of magnitude) as bad as what we were seeing last week: >> > >> > motherlode.ucar.edu% windfall.evsc.virginia.edu (128.143.142.246), 30 hops > max, 40 byte packets >> > 1 mlra-n13 (128.117.13.253) 0.393 ms 0.406 ms 0.321 ms >> > 2 vbnsr-n2 (128.117.2.252) 0.719 ms 0.808 ms 0.462 ms >> > 3 internetr-n243-104 (128.117.243.106) 0.835 ms 0.750 ms 0.687 ms >> > 4 denv-abilene (128.117.243.126) 1.745 ms 1.435 ms 2.519 ms >> > 5 kscy-dnvr.abilene.ucaid.edu (198.32.8.14) 12.757 ms 12.745 ms 12.61 > 0 ms >> > 6 ipls-kscy.abilene.ucaid.edu (198.32.8.6) 21.673 ms 21.931 ms 22.044 > ms >> > 7 clev-ipls.abilene.ucaid.edu (198.32.8.26) 28.459 ms 27.756 ms 28.04 > 2 ms >> > 8 nycm-clev.abilene.ucaid.edu (198.32.8.30) 39.994 ms 42.397 ms 40.91 > 6 ms >> > 9 uva-internet.misc.Virginia.EDU (192.35.48.41) 48.781 ms 48.051 ms 4 > 8.335 ms >> > 10 carruthers1-all-router.acc.Virginia.EDU (128.143.99.2) 48.793 ms 50. > 587 ms 48.993 ms >> > 11 garrett-router.acc.Virginia.EDU (128.143.227.55) 48.427 ms 55.669 ms > 56.705 ms >> > 12 windfall.evsc.Virginia.EDU (128.143.142.246) 49.113 ms * 51.171 ms >> > motherlode.ucar.edu% traceroute ldm.meteo.psu.edu >> > traceroute to ldm.meteo.psu.edu (128.118.28.12), 30 hops max, 40 byte pack > ets >> > 1 mlra-n13 (128.117.13.253) 0.397 ms 0.293 ms 0.260 ms >> > 2 vbnsr-n2 (128.117.2.252) 0.497 ms 0.723 ms 0.714 ms >> > 3 internetr-n243-104 (128.117.243.106) 0.985 ms 0.655 ms 0.593 ms >> > 4 denv-abilene (128.117.243.126) 2.250 ms 1.694 ms 1.895 ms >> > 5 kscy-dnvr.abilene.ucaid.edu (198.32.8.14) 13.265 ms 12.135 ms 12.27 > 0 ms >> > 6 ipls-kscy.abilene.ucaid.edu (198.32.8.6) 21.351 ms 21.388 ms 21.532 > ms >> > 7 clev-ipls.abilene.ucaid.edu (198.32.8.26) 27.697 ms 27.944 ms 27.63 > 4 ms >> > 8 abilene.psc.net (192.88.115.122) 31.044 ms 31.789 ms 30.856 ms >> > 9 penn-state.psc.net (198.32.224.66) 34.750 ms 35.134 ms 35.304 ms >> > 10 * * * >> > 11 * * * >> > 12 * * * >> > 13 ^C >> > >> > motherlode.ucar.edu% traceroute sunny.atmos.washington.edu >> > traceroute to sunny.atmos.washington.edu (128.95.89.38), 30 hops max, 40 b > yte packets >> > 1 mlra-n13 (128.117.13.253) 0.531 ms 0.237 ms 0.376 ms >> > 2 vbnsr-n2 (128.117.2.252) 0.525 ms 0.578 ms 0.611 ms >> > 3 internetr-n243-104 (128.117.243.106) 1.091 ms 0.748 ms 0.603 ms >> > 4 denv-abilene (128.117.243.126) 1.559 ms 1.391 ms 1.361 ms >> > 5 sttl-dnvr.abilene.ucaid.edu (198.32.8.49) 30.196 ms 30.232 ms 30.05 > 6 ms >> > 6 hnsp1-wes-S5-0-0.pnw-gigapop.net (198.48.91.77) 29.871 ms 30.391 ms > 30.313 ms >> > 7 uwbr1-GE5-0.cac.washington.edu (198.107.151.51) 30.106 ms 30.904 ms > 30.213 ms >> > 8 dustbuster-V49.cac.washington.edu (140.142.150.2) 31.096 ms 31.053 m > s 30.981 ms >> > 9 sunny.atmos.washington.edu (128.95.89.38) 30.621 ms 31.133 ms 30.48 > 3 ms >> > >> > Are you still seeing the slowness today? >> >> Our traceroutes this morning (Monday) to motherlode don't look bad (except >> for a few blips now-and-then) but we've seen data slowness all weekend I'm >> told. Looking at things this morning, the DDPLUS/HDS stuff is running >> about 3-4 minutes behind which isn't bad, but normally this stuff is >> within a minute, usually less. The NEXRAD stuff from SSEC, for >> comparison, is within a few seconds of transmission. Since we're in a >> non-peak load time, I'm guessing delays from motherlode will increase as >> the data rate increases... we'll see. Since the traceroutes look pretty >> good, it would appear that the data are either being throttled or hitting >> severe bottlenecks. I'll continue to monitor it today. >> >> Art. >> >> > >> > Tom Yoksas > >Arthur A. Person >Research Assistant, System Administrator >Penn State Department of Meteorology >email: address@hidden, phone: 814-863-1563