According to http://fasterdata.es.net/fasterdata/host-tuning/linux/ there are problems with the Linux TCP network congestion algorithms:
"NOTE: There seem to be bugs in both bic and cubic for a number of versions of the Linux kernel up to version 2.6.33. We recommend using htcp with older kernels to be safe."
The FTS channel from SARA to Weizmann has been changed to use htcp and indeed throughput has improved and timeouts have been reduced. (The SARA end is 10G but the Weizmann end is only 1G.)
Do others have experience with tcp congestion algorithms?
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