This page covers how to migrate from EPrints 2 to EPrints 3.
The migration toolkit, available from http://files.eprints.org/ does quite a bit of the heavy lifting. It is intended to help configure an EP3 archive to have the same files, eprint types etc. as an EPrint 2 repository and then copy the data over.
Release 0.2 of the toolkit is still very raw. Later versions will provide more functionaliy, but some people need this ASAP so we're releasing very early versions.
Un-tar the package on the same machine as your EPrints 2 repository.
If your EPrints 2 was not installed in /opt/eprints2 then you'll need to modify the first line of the two .pl scripts in the toolkit.
Also, get an EPrints 3 server set up. This can be either on the same machine (you'll need a separate instance of apache as ep2 and ep3 can't run under the same server at the same time, put it on port 8080 for now), or on a different machine. Get a repository created (probably with the same ID as your ep2 repo, although that's not essential). The database will need to be different or you'll get in a mess.
This tool takes the id of an EPrints 2 repository and generates a number of EPrints 3 config. files. Copy these files into the cfg dir of your EPrints 3 repository. It also creates a file called migration_notes.txt with some helpful comments of anything it's messed with.
Get your (empty) EP3 repository up and running using these configuration files.
Add "public" to cfg/namedsets/security (this should happen automatically, but doesn't, yet)
This script exports the data from your EPrints 2 repostory in a format which can be imported by EPrints 3.
To export the data do the following:
export3data.pl ARCHIVEID eprints > eprints.xml export3data.pl ARCHIVEID users > users.xml export3data.pl ARCHIVEID subjects > subjects.xml
Note that "eprints.xml" will be huge as it contains all documents, including the actual files.
Some little hacks required
To preserve the ID's of the eprints and users a little hack is required. Edit perl_lib/EPrints/DataObj.pm find the subroutine "create_from_data". Find the line:
next if $field->get_property( "import" );
and after it add:
next if( ( $dataset->id eq "eprint" || $dataset->id eq "user" )