[BBLISA] Live Sync / Backup / Sync without crawling

[Edward Ned Harvey]

> > 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.

Huh - I didn't know inotify came with a text-based utility of its own.  That sounds like it might be worth trying.

Somebody else I asked came up with this, which is really cool:
http://code.google.com/p/lsyncd/