advice on upgrading production FreeBSD 5.4

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pobox at verysmall.org wrote:
> I inherited a production FreeBSD 5.4 used as a web/mail server (Apache, 
> PostgreSQL, php, qmail, vpopmail, Courier). Could anybody help me with 
> information about a web resource on upgrading such system (all, OS only 
> or component by component) with minimum downtime. I looked into cvsup 
> and portupgrade - is this the right way for production systems or is 
> there another one? For example is it possible to have the older version 
> running until the new one downloads/compiles and then to replace it 
> within seconds? Also - what if the new version does not work correctly - 
> is it possible to keep the old and revert to it.

regarding rolling-back to an older version, check out the 
--backup-packages option of portupgrade. It will create a package of the 
already installed version so that you can reinstall it without recompiling.


> 
> Thank you,
> Iv
> 
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