Originally posted by: KKN

I am using AIX 5.3 in DS4700 GPFS filesystem. I am trying to backup a filesystem using rsync to another filesystem (because i dont have tape drive) but the speed in rsync is very low only 30MbPs. But cp is faster than rsync. Anybody help me with rsync speed issue. the command i used

# rsync -avz /gproj/* /sata/gproj*

Originally posted by: GarlandJoseph

What is the performance when you remove the -z (compress option)?

Originally posted by: KKN

Ya  i checked still the progress im getting is 32 to 37 MBpS only

Originally posted by: GarlandJoseph

I would try running bench marks against smaller  sets of files comparing cp with rsync using time ; tprof; and truss.     You did not qualify the time difference.  Run the cp and rsync on a smaller set of files prefaced by the time command (time cp... verus time rsync).  You should also look at iostat.

Originally posted by: KKN

i did those things with time i tried copying a single block iso file of 7 GB using both the commands. i found cp is done in 1.2 minutes and rsync is taking 2.58 minutes 

Originally posted by: YannickBergeron

What is your rsync version?

Originally posted by: KKN

my rsync version is rsync -3.0.6

Originally posted by: YannickBergeron

It's relatively old (2009) but not *that* old

You may want to give a shot to Rsync 3.1.x (3.1.1 is the latest) as this is part of their release note: Rsync version 3.1.0 has been released. This is a feature release that improves performance, ...