[opencms-dev] Upgrading from 7.5.4 to 9: best practices

[Schliemann, Kai]

Hi Roman,
welcome back to OpenCms!
I would try to do a fresh install of 9.5 or 9 and import all your modules into it.
If necessary, activate the xmlpage explorertype in WEB-INF/config/opencms-workplace.xml
After that, import all your content.
You can now start adding the new editing features to your templates.
When finished, you can start to replace your content pages with the new containerpages.

Take care, that you have enough Xmx (1024m should be ok)  when you install OpenCms 9.x.

If you do not have any custom code / widgets, your upgrade should work well. If you have written your own contentload collectors, you should consider replacing them by Solr queries.

HTH
Best regards
Kai


-----Ursprüngliche Nachricht-----
Von: opencms-dev-bounces at opencms.org [mailto:opencms-dev-bounces at opencms.org] Im Auftrag von Roman Uhlig
Gesendet: Montag, 9. Februar 2015 11:48
An: opencms-dev at opencms.org
Betreff: [opencms-dev] Upgrading from 7.5.4 to 9: best practices

After a long absence from OpenCms because of freelancing in the field of mobile apps, I'm now facing the task of upgrading several OpenCms 7.5.4 installations running on Debian and GenToo Linux machines.

My question is: should I directly upgrade to the latest version or should I go in several steps to not get overwhelmed by the changes that may occur due to the upgrade?

I'm asking because I already tried an update to OpenCms 8 according to the document from Michael Emmerich (OpenCms Days 2011). There he says:
"Your existing OpenCms 7.x webapp will run in OpenCms 8 – most likely without any changes". That did not work for me, many of our OpenCms webapps did not work anymore as expected after the update.

Any hint how to progress in this matter whould be very appreciated.

Thank you very much,
Roman
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