Rsync limit transfer speed not working
rsync
Solution
--bwlimit=KBytes/s applies a moving average to throttle the resulting throughput, so you'll only notice it for a transfer which is considerably larger than your available bandwidth.
from the man pages,
blocks of data are sent, then if rsync determines the transfer was too fast, it will wait before sending the next data block. The result is an average transfer rate equaling the specified limit.)
Take a look into trickle which seems to take on this concept with a more refined algorithm.
Problem
i'm trying to limit the bandwidth Rsync is using by specifying the --bwlimit option, but it doesn't seem to work. I don't know if i'm doing something wrong... : The maximum possible upload speed = 10mbit/sec. I'd like to limit rsync to about 50% : Rsync command = ``` [~] # rsync --version rsync version 3.0.7 protocol version 30 [~] # rsync -a --verbose --partial --bwlimit=500 -e 'ssh -p 2200 -i /share/ssh/id_dsa' admin@10.0.3.10:/share/MD0_DATA/ /share/LocalData ``` Result = ============================================================================== Solution as provided below: ``` [~] # ipkg install trickle Installing trickle (1.06-3) to root... Downloading http://ipkg.nslu2-linux.org/feeds/optware/ts509/cross/unstable/trickle_1.06-3_i686.ipk Installing libevent (2.0.16-1) to root... Downloading http://ipkg.nslu2-linux.org/feeds/optware/ts509/cross/unstable/libevent_2.0.16-1_i686.ipk Configuring libevent Configuring trickle Successfully terminated. [~] # trickle -d 500 rsync -a --verbose --partial -e 'ssh -p 2200 -i /share/ssh/id_dsa' admin@10.0.3.10:/share/MD0_DATA/ /share/LocalData trickle: Could not reach trickled, working independently: No such file or directory receiving incremental file list ```