[TYPO3-english] Advice on upgrading 4.2.12

Jigal van Hemert jigal at xs4all.nl
Tue Nov 15 22:19:22 CET 2011


On 15-11-2011 19:52, yanagik317 at netscape.net wrote:
> I like/need to upgrade this, preferably to a new RHEL 6 server
> running PHP 5.3.x and maybe to the latest Typo3 4.4.x.  I'm a little
> hesitant to move to Typo3 4.5 in this particular downtime I can get

I'd personally go in steps to the latest version:

1. Make sure I have the latest version of the extensions which are 
compatible with 4.2 / PHP 5.2 on the site. Make backups and try upgrades 
of each version.

2. Move the installation to the PHP 5.3 server. Don't try to run it, but 
upgrade the core to 4.3. Run upgrade wizards, etc. and see if we can get 
this running. Upgrade extensions and test if everything runs correctly. 
If necessary use alternative extensions.
Keep a log of all the steps taken to achieve a running site

3. Upgrade to 4.4, upgrade extensions, test, test, test. Keep a log of 
all steps taken.

4. Upgrade to 4.5 and later 4.6.

5. Test thoroughly until you're certain everything runs fine.

Now you've made a test migration which hopefully ended with a fully 
working site. If you're satisfied you have detailed instructions to 
repeat the process at the time when you want to migrate the site.

This leaves the current site running on the old server and you have 
plenty of time to figure out how to fix the issues you might find.

If step 2 doesn't work out you can try to upgrade to 4.3 first on the 
old server (make backups!) and then move to the new server. 4.3 and 
higher are designed to work on PHP 5.3 too.

Kind regards / met vriendelijke groet,

Jigal van Hemert.

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