Hi Robin, I am quiet new too, and i ran into a "out of memory" situation, while reading a large file. Did you check to see if the reading machine starts swapping? ( you can check with top ) That could make the machine and the reading real slow.
Kind regards, Ed On Mon, 2013-03-04 at 10:45 -0500, Robin Chen wrote: > Hi, > > > I have recently started my experiments with Tahoe and deployed 24 > Tahoe storage nodes in 4 data centers (using 9 out-of 24 coding), but > I'm running into a performance problem. > > > I'm new to this email list, so I'm not sure if this problem has been > discussed before or not. > > > I would expect the "reading" performance (reading 9 shares) to be > better than the "writing" performance (writing 24 shares in 4 > geographically-distribute data centers), but the reading time is > typically two times longer in most of my tests with files > 300MB. > > > For example, for a file size of 383MB, I'm getting about 16Mbps in > throughput for writing, but only about 8.8Mbps in reading. > > > Any possible explanation? > > > Thanks! > > > Robin > _______________________________________________ > tahoe-dev mailing list > [email protected] > https://tahoe-lafs.org/cgi-bin/mailman/listinfo/tahoe-dev _______________________________________________ tahoe-dev mailing list [email protected] https://tahoe-lafs.org/cgi-bin/mailman/listinfo/tahoe-dev
