#199 ✓resolved
Andreas Ronge

Problem upgrading to Neo4j

Reported by Andreas Ronge | November 25th, 2011 @ 10:07 PM

Using the new neo4j-upgrade script or following the http://neo4j.rubyforge.org/guides/configuration.html#upgrade-to-a-n...
is not successful

Get the following exception after the upgrade

NativeException (org.neo4j.graphdb.TransactionFailureException: Could not create data source [nioneodb], see nested exception for cause of error):

Which means that the upgrade failed. Maybe we need to upgrade in smaller steps (check the neo4j - java documentation)

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Neo4j.rb is a graph database framework for JRuby.

It provides:

* Mapping of ruby objects to nodes in networks rather than in tables.
* Storage of ruby object to a file system.
* Fast traversal of relationships between nodes in a hugh node space.
* Transaction with rollbacks support.
* Indexing and quering of ruby objects.
* Integration with Rails

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