Re: [LUG] rsync and file transfers

[David Vanstone <vanstone.david@xxxxxxxxxxxxxx>]

Rob Beard wrote:
> On 18/11/10 23:09, David Vanstone wrote:
> > Hey there
> >
> > I have a problem I can't really work out how to solve. I'll try to
> > explain as best as possible.
> >
> > Basically I have a server (in one house) and a client computer (in a
> > separate house)
> >
> > What I want to be able to do is - Plug USB Hard drive into server
> > computer, make it send any news files since the last time it was plugged
> > in from a certain folder on the server to the USB HDD.
> >
> > Then take the USB HDD to the client PC plug it in and all the new files
> > off the USB Drive, copy them to a folder on the client PC then delete
> > all files off the USB Hard drive.
> >
> > I'd like it to do this automatically so its literally just plug the
> > drive in and away it goes. We are talking 1 terrabyte+ so need the USB
> > HDD to empty after each transfer and hold some sort of log file that the
> > server will query, so that it doesnt transfer all the files again, only
> > new ones from that differ from the last transfer. rsync would work great
> > on this if i didnt need to keep the USB HDD empty, unless any of you
> > know a way of doing it?
> >
> > Any ideas would be a great help!
> >
> > Many Thanks,
> > Dave
>
> To set it off automatically I would guess something in UDEV which when 
> the drive is attached it triggers a script (I've done this with an 
> automatic backup to USB hard drives a while back).
>
> As far as rsync goes it has an option to either copy files based on 
> time stamps or on checksums.  I've done this in the past where only 
> changes between files were copied over saving on how much it copied.  
> At least copying only what has changed you're not going to be copying 
> 1TB+ of every time, although doing it with 100GB of VMWare disk images 
> from an internal drive to a USB external drive still took a while.
>
> Rob
Yup on it with udev, pretty cool app, thanks for your help so far, but 
google is still getting a hammering at the moment! :P haha

Dave

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