>From: Tarun Banka <address@hidden> >Organization: CSU >Keywords: 200406140800.i5E807tK001480 LDM Tarun, >I am a graduate student working with Dr. Chandra at Colorado State University >on the LEAD Project. I have some questions realted to the LDM Protocol. > >Could you please tell me what's the maximum throughput possible using LDM >between two end machines. We ran stress tests on the top level relay node we operate here at UCAR, thelma.ucar.edu, in which it relayed a sustained 1.2 TB of data per day to some 100 downstream connections (total volume, not volume between two machines) without introduction of latency. During this test, the peak transfer rate was over 2.6 TB per day. We routinely feed all data available in the IDD from thelma to multiple machines at Unidata and in the community, again without introduction of latency. One of the machines getting pretty much all of the data in the IDD from thelma is sunset.atmos.colostate.edu. For reference, the IDD contains all NEXRAD level II data in addition to the highest volume datastream CONDUIT. Plots of data volumes being received by machines participating in the IDD and reporting LDM-6 statistics can be seen at: http://my.unidata.ucar.edu/content/software/idd/rtstats/siteindex.php >As I understand, LDM uses TCP as a transport layer >protocol, does that impact the througput. TCP is the transport layer for the Internet, so its use is inherent in doing any access across the Internet. >If my applications has minimum rate requirement for the radar data, then Is it >possible to satisfy this request using LDM ?. Easily. >Looking forward to hear from you soon. > >Regards, >Tarun Cheers, Tom Yoksas -- NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publically available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.