[Nottingham] Just how smart is rsync?

[Eben Till]

Is it one huge compressed image or is it rather small bits that contribute?
I think rsync can tell the difference between between lots of folders and
files but if it's on big file like vmdk or something you might have issues.
I'm by no means an expert so don't believe everything
(s/everything/anything) I say ;)

~Eben

On Thu, May 26, 2011 at 4:00 PM, Jason Irwin <jasonirwin73 at gmail.com> wrote:

> Something has just come up at work and (as per usual) the architects have
> left it to the last second before asking for stuff.
>
>
>
> I need to transfer an zipped 11gb VM image from the USA over the corporate
> VPN by tomorrow AM.  Nice.
>
> As luck has it, this VM image is based on the same baseline as another one
> that got transferred a few days ago.  Also zipped.
>
>
>
> If I copy that first image locally, set the name correctly and then ask my
> USA colleague to begin the transfer from his end; will rsync be smart enough
> to spot that large chunks of the 11gb are the same?  Or does it not do
> sub-file?
>
>
>
> Or, more likely, will having the VM image zipped up have buggered any
> chance of a comparison?
>
>
>
> I am delving into the man page and Google, but suffer from forest/trees and
> needle/haystack.
>
>
>
> Cheers,
>
>
>
> J.
>
>
>
> _______________________________________________
> Nottingham mailing list
> Nottingham at mailman.lug.org.uk
> https://mailman.lug.org.uk/mailman/listinfo/nottingham
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.lug.org.uk/pipermail/nottingham/attachments/20110526/76c29f29/attachment.htm>