[CentOS] Re: Migration from RH9
ugob at lubik.ca
Thu Nov 22 17:48:26 UTC 2007
James A. Peltier wrote:
> Leonel Nunez wrote:
> I can second this. I am in the process of migrating 5 research labs
> from Suse 10.0 to CentOS 5 (for various reasons). The migration has
> been in testing phase for over 3 months and a lot of bugs have been
> found and corrected in that time.
> A migration from any OS to another is a very tedious and time consuming
> step. You will need to work on each part of the migration individually.
> Start with the services that you are most familiar with or that you
> feel you could learn the quickest.
> Setup a machine with CentOS 5 and begin testing that service. When you
> are confident that said service is operating as it should, shift that
> service from the production server to your testing server. Let it run
> there for a bit because chances are you'll find bugs and that will give
> you a chance to fail the service back over (if necessary) while you
> correct the issue.
> Once you've gotten all the services over to the new box you'll be happy
> to know you did it the "right way" and that you've incurred the least
> amount of pain for you, your fellow workers who work with you and your
> IMHO, you should spend a lot of time testing the Perforce migration,
> followed by your web services. Migration of any SCM is a potentially
> complicated operation. I haven't used Perforce before, but be careful.
> Secondly, careful testing of your web services is crucial. You'll most
> likely be upgrading version of Apache, PHP and libraries at the same
> time which can break things like backward compatibility. Samba depending
> on it's function within your institution would be a close third, if not
> a tie for number 2, but that's up to you.
> The squid services are probably not all that complicated if they're only
> using a caching server (forward or reverse).
> Of course, with proper software unit testing and a bit of elbow grease
> I'm sure it will all go over well.
> There are various papers on best practices for OS migrations and various
> other system administrator task on the web just google for migration
> best practices and you'll find lots.
Wow, excellent advice!
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