[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: Slow copy

On Thu, 15 Dec 2005, Ronny Aasen wrote:

> On Thu, 2005-12-15 at 12:42 +0000, Graham Smith wrote:
> > Hi,
> > 
> > This is perhaps one of the stranger questions to be asked but I'm looking for 
> > a utility that will copy a file slowly.
> > 
> > Part of my ad hoc backup system is to copy the nightly backup tar file from 
> > our production machine onto another machine. The problem is that the 
> > production machine is not exactly what you would call high performance and 
> > the file copy basically causes everything else to grind to a halt. It doesn't 
> > matter to me that the copy is done in 5 minutes or 50 minutes what matters is 
> > that it doesn't kill the server for 5 minutes a day.
> > 
> > What I am basically looking for is a version of cp with a max copy rate 
> > argument. I would write my own but I can't believe that I'm the only one who 
> > has ever wanted this feature so I suspect there is one already in existence.
> > 

you can use 'nice' on the "backup script/programs" to give it low
cpu priority

> if you do your copy with rsync, you can use the --bwlimit argument.
> if you do your tar's with --rsyncable you would not have to transfer the
> whole tar file each time either, only the differences. 

a gazillion ways to copy files from xxx to yyy machine :-)

> if you do not use rsync you can throttle your aplication with trickle or
> shaperd

c ya

Reply to: