[rsync-announce] Rsync 2.6.1 released (includes security note)
ewhiting at amis.com
Tue Apr 27 17:52:11 GMT 2004
rsync-announce at lists.samba.org wrote:
> Rsync version 2.6.1 has been released. It is primarily a performance
> release that requires less memory to run, makes fewer write calls to
> the socket (lowering the system CPU time), does less string copying
> (lowering the user CPU time), and also reduces the amount of data
> that is transmitted over the wire. There have also been quite a few
> bug fixes. See the release NEWS for the full details:
I just tried a simple test of 2.6.1. I still need to do more testing, but here
is some data that shows a decrease in cpu time. The test results varied
depending on other external loading, but here is some representative data:
rsync 2.5.6 both ends -- 200,000 files (source files read via nfs, dest is over
ssh to local disk)
approx memory both sides 30M -- receiver had a 18M jump at the end to 48M
rsync 2.6.1 both ends-- same tree, same setup
approx memory both sides 22M -- receiver had a 18M jump at the end from 20G to
real time shows a good speed up. (not 100% meaningful unless you have a very
controlled test environment)
user time shows a good speed up.
sys time also shows a speed up.
memory use appears to be less.
These performance fixes look like they could be helpful. My current bottlenecks
are probably still the link speeds to remote locations and the nfs source read,
but this new rsync might help some too.
More information about the rsync