I am currently using rsync to transfert large file from a host to another.
I would like to limit the debit for this transfert. After reading the man page I found the option –bwlimit which is expecting a KB/s value.
I want to limit the transfert to arround 100Mbit/s
So I used the following settings :
rsync --progress -v --bwlimit=10000 --temp-dir=/tmp srv:/tmp/* /tmp/
But this doesn't seems to be respected according to the output of rsync :
file.sql.gz
570851702 100% 33.90MB/s 0:00:16 (xfer#5, to-check=34/39)
file.sql.gz
11195140 100% 7.45MB/s 0:00:01 (xfer#6, to-check=33/39)
file.sql.gz
51439169 100% 19.41MB/s 0:00:02 (xfer#7, to-check=32/39)
file.sql.gz
34022 100% 1.55MB/s 0:00:00 (xfer#8, to-check=31/39)
file.sql.gz
2305698 100% 6.96MB/s 0:00:00 (xfer#9, to-check=30/39)
file.sql.gz
2152942 100% 2.73MB/s 0:00:00 (xfer#10, to-check=29/39)
file.sql.gz
86655633 100% 19.33MB/s 0:00:04 (xfer#11, to-check=28/39)
file.sql.gz
3614476032 40% 34.82MB/s 0:02:28
If I'm not wrong : 19.33MB/s ~= 154Mbit/s
So what is wrong here ?
PS : rsync version 3.0.6 protocol version 30
Thanks for your help !
Best Answer
I think you experienced some "burstiness" as mentioned in the manpage:
So as I asked before the overall ratio at the end of your job was at last limited to 10M.