rsync - Jun 2011 - show how much bytes transfered per rsynced file?

We use rsync a lot to backup various stuff over bigger distances and its my
project to look deeper into this backups to optimize backup.

While its easy to make rsync print the size of the files it is transferring I
didnt figure out how to determine how much bytes are actually transferred per
file which is even more interesting.

If I sync a whole data-structure with 100.000 files lets assume 1000 files are
actually changed and they have 10M - 1G each.  The Delta-algorithm only
transfers the amount of data that has really changed (at least it tries and it
does a good job) and I would want to know how much bytes this are per file. 
rsync only tells me the total amount of transfered bytes but not per file.

The reason for this is that I need to find out which files causes most of our
backuptraffic and then probably look for different and more efficient ways on
syncing this files.

thnx a lot,
peter

peter pilsl (pilsl at goldfisch.at) wrote on 17 June 2011 15:22:
 >While its easy to make rsync print the size of the files it is transferring
I didnt figure out how to determine how much bytes are actually transferred per
file which is even more interesting.

Use %b in --out-format.