Old thread, but this is a current topic for me and you can never talk too much about backing stuff up, so I'm bumping it.
Between 100 and 400 times faster.
wrote 4394533 bytes read 104210 bytes 101095.35 bytes/sec
total size is 628733048 speedup is 139.76
Finished at Sun Feb 18 07:44:33 GMT 2007
I'm doing a read lock flush, then rsync to a spare server.
Fastest backup system I've ever had for MySQL, and a lot less messy and more reliable than syncronisation which I've also played with (under MySQL 4.* anyway).
[edited by: trillianjedi at 11:49 am (utc) on Feb. 18, 2007]