[BBLISA] Live Sync / Backup / Sync without crawling

[Tom Metro]

Edward Ned Harvey wrote:
> Hey, anybody know of any program, which can sync or mirror a
> directory, without the need to scan the directory?

Nope, but it sounds like a good idea.


> But with inotify etc, it's possible to have already
> created a list of what's changed, and simply mirror the changes
> rather than doing the whole tree crawl.

inotify will tell you which files have changed, but it won't tell you 
what blocks of those files have changed - no? I don't remember.

It's been a while since I looked at inotify, but the package for Linux 
comes with a command line tool that sends notification messages to 
STDOUT so you can use it in a script. A fairly simple script that parses 
out the file name and then calls cp or rsync on it ought to do it. For a 
bit more sophistication, add some code to delay processing by a few 
minutes and batch the operations, so you don't end up repeatedly 
mirroring the same file after every little write.

  -Tom

-- 
Tom Metro
Venture Logic, Newton, MA, USA
"Enterprise solutions through open source."
Professional Profile: http://tmetro.venturelogic.com/