We've being trying to make solr.multicore working for so long following http://doc.ez.no/Extensions/eZ-Publish-extensions/eZ-Find/eZ-Find-2.5/Advanced-Configuration/Using-multi-core-features

We've tried again now, and finally made it.

The doc in link state "Both of them must contain a data and a conf subdirectory", while it works on our installation only by not adding "data" and letting solr creating it.

Another info to add relate to the sentence: "adapt the Solr dataDir": it would help others to state: modify the xxx.xml file with this code "..." so to specify the path to your data dir

Steps to reproduce

just follow instruction in http://doc.ez.no/Extensions/eZ-Publish-extensions/eZ-Find/eZ-Find-2.5/Advanced-Configuration/Using-multi-core-features from a couple of already working ezfind-solr installation: you cannot move data dir that easily