On Tue, 29 Oct 2002, George Toft wrote:
>
> I would try to be smart about what I mirror. You don't need to copy a
> file that hasn't changed, so I would run find / -ctime -1 to get a list
> of files whose status has changed in the last day, and mirror those.
> Next, you have to account for deleted files. I can think of a few
> ways. The one I used was running find periodically and using diff to
> see what is missing from the last time I ran it. Delete those files. I
> synced 4 servers every 20 minutes this way. Fortunately, the
> filesystems were small so find didn't kill the system.
rsync -a --delete /from/stuff/ /to/mirror
or variations on this theme, read the man page & see
http://www.rsync.org/ (from the SAMBA team). rsync rocks.
I've rolled hourly server-to-server mirrors sorta like this:
rsync -a --delete /from/here/ destination.server.tld:/to/mirror/dir
Best if you have a direct fast-ethernet or gigabit ethernet, but it works
just fine coast-to-coast across disparate backbones too.
Your source host can have rsynd running (or available via xinetd and
friends), with the rsyncd config file often here: /etc/rsyncd.conf
Check the documentation and cruise google, rsync has been around quite a
while and is very well documented.
- t
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