[TriLUG] copying files

[Joseph Mack NA3T]

On Fri, 22 Jun 2012, Alan Porter wrote:

> Ah, so if you're not tired of hearing about rsync yet...

I had no idea that copying files would turn into such a 
large topic.

> One thing you'll notice about a large OUTBOUND file 
> transfer from your home is that the rest of your internet 
> usage is crap while the file transfer is going on.

I'm familiar with this. I'm a bittorrent server for 
Slackware and if I let the outbound bandwidth go over 
30kBps, no-one can download anything.

> Rsync allows you to cap the bandwidth at a fixed level. 
> Say you want to stay just under your 30kBps limit. You 
> simply do this:
>
> rsync -avz --bwlimit=28 /home/joe/pr0n/ joe at trilug.org:pr0n-from-home/

I was reading the options for rsync earlier. It's got 
everything you could imagine, but I missed --bwlimit.

> And here's the cool thing... you can tweak that bwlimit 
> (KBYTES/sec) number by CTRL-C and trying again with a new 
> bwlimit. Rsync is smart enough to pick up where it left 
> off (OK, it's dumb, it recalculates the differences each 
> time, but the end result is the same).

Well, yes it doesn't have to update any files that are 
already updated, but still it's very nice.

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!