Jonathan Ben Avraham wrote:

Hi Miki,
It is not good policy to upgrade production servers, ever. I found this
out through many bad experiences of many years. Don't do it, ever.


Well, I have had one good experience with a Debian stable server. Upgrade from Potato to Woody via remote SSH session, incurring almost no downtime. I do agree with the notion at large, however. Especially when the system is not maintained with apt.

Instead, use different hardware to make a clean installation.

It's a costly solution. I'm not saying it won't be actually cheaper on many occasions than the alternatives, but still costly nontheless.

Then migrate
the data using rsync and test the new server at your leisure. When you and
your customer are satisfied that it works, cut over to the new server and
leave the old one around for a month, just in case you forgot something.


The customer should be the ultimate decision maker on this one. Offer the alternatives, explain the risks. Explain the costs. Ask them to decide.

Shachar

--
Shachar Shemesh
Lingnu Open Systems Consulting
http://www.lingnu.com/


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