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Upgrading Alfresco 4.0.0

Question asked by spedrosa on Sep 15, 2015
Latest reply on Sep 17, 2015 by sscbrian
Hello everyone. I'm new here. I was asked to upgrade my company's alfresco, but i just want to do the things right. I'm not a very experienced user in this (truely not in Alfresco) so i might want a little help.

Until now i know this:

1 - The server has Alfresco version 4.0.0 ( 4.0.e ? ). Found Lucene files and solr but don't know what the system uses. Only know that the system was installed in this version 4.0 and never got any upgrades.

2 - What should be the next step? Backup the files before upgrade? so what files do i need to backup? /alf_data/contentstore , /alf_data/contentstore.deleted and
/alfresco-4.0.e/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/module/test/ is engough?

3 - I read something about backuping the database but i really don't know what file or files to backup to ensure it's backup.

I'll apreciate any help anyone could give  :)