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Baudouin, > My computations are based on the plots, so I may be wrong about the > 100MB/hour. Judging from http://www.unidata.ucar.edu/cgi-bin/rtstats/iddstats_vol_nc?EXP+tigge-ldm.cma.gov.cn the mean aggregate data transfer rate from ECMWF to CMA is about 200 megabytes per hour. This is about 444 kilobits per second. Not very good. > I just have a hunch that we have a timeout for every > field, and that we are not streaming the data at all. My > understanding of LDM is that once we have established a connection > (actually 20 connections in our case), this connection is reused > until we run out of products. The connection from an upstream LDM to a downstream LDM will exist until either LDM terminates or the RPC/TCP/IP layers decide that communication is impossible. > If that is the case, we should not see > any difference with an ftp transfer. Agreed. Regards, Steve Emmerson Ticket Details =================== Ticket ID: YCA-363338 Department: Support IDD TIGGE Priority: Normal Status: On Hold