Hi Brian, Brian Warner wrote:
> Yeah, this is disappointing. Our automated speed tests [1] show an upload > speed between 0.8MBps and 1.4MBps, using 100MBps local bandwidth, which is > much slower than we'd like. The upload speed used to be closer to 2.0MBps > (and the download speed was nearly 5MBps) a year ago, before we reduced the > maximum segment size to 128KiB (to improve alacrity). This hurts throughput > because we aren't yet using a windowing protocol to upload shares, so we burn > a round-trip time for each segment, so smaller segments means more time > wasted. It means that my upload speed (0.125 MBps) 180ms away from allmydata.com servers is still 8 times slower than your automated speed tests. Does it means that latency hurts throughput that much ? For the record, uploading plaintext directly on the webapi of a production allmydata.com node allows me to saturate my upstream bandwidth. Thanks to TCP's efficient flow control. François _______________________________________________ tahoe-dev mailing list [email protected] http://allmydata.org/cgi-bin/mailman/listinfo/tahoe-dev
