[CentOS] How to speed up Rsync transfers

Sat Feb 23 04:33:00 UTC 2008
nate <centos at linuxpowered.net>

Dan Carl wrote:
>

> I just ran a test from one local box the another on a 100Mbit link and the
> fastest transfer OI got was 10MBytes/second but most were between
> 1MBytes/second and 4MBytes/second.

Pardon the stupid suggestions but

- Did the test you run with iperf, was that a bi-directional test,
  are you sure you weren't testing your inbound speed at ~700KByte/s
  rather than your outbound speed? With most connections, inbound
  speed is several times faster than outbound speed.
- Do you know what sort of bandwidth your "supposed" to have from your
  ISP?
- Are you aware of any sort of filtering or throttling that your ISP
  does? Do you have a business class connection, or are you on one
  of the big generic consumer ISPs(much more likely to do strange
  things with your packets).

My guess is that the test you did only tested your inbound bandwidth
and not your outbound. 100KByte/second is fairly typical for outbound
connectivity for consumer broadband links. Of course if your lucky
enough to have a real good connection such as metro ethernet, or a
direct fiber connection, then that's another story and you should
have plenty of upstream bandwidth.

nate