fastest way to duplicate production server?
dmp at bitfreak.org
Tue Jul 12 22:06:40 GMT 2005
From: RC <rubbishcollector at yahoo.com>
> We have a production FreeBSD 4.10 server running old versions
> of Apache/MySQL/PHP from ports. We'd like to upgrade
> Apache/MySQL/PHP to the latest versions. Before upgrading
> we'd like to test on a test box.
> What's the fastest way of duplicating the existing
> Apache/MySQL/PHP (including user databases)? (The production
> server cannot go down for more than a few seconds.)
Make per-filesystem back-ups of everything excluding those files opened
read-write by whatever services you're running (ignore log files). Use
nice to run the backup at a priority low enough to not usurp resources
from the production services. Stop whatever services are running. Use
fstat to make sure the excluded files are closed. Make a backup of the
files excluded from the first backup run (again, ignore logs). Restart
whatever services you stopped.
If you can get away with it, flip the volumes read-only before doing the
backup, it can make things just a little bit faster.
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