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We need to find out what, if anything, must be done to prepare existing cores for use by a vastly newer server version. 

• The search core might be dropped and the repository re-indexed.

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• The statistics core could be rebuilt if a site has kept its DSpace logs (or the extracts prepared by bin/dspace stats-log-converter

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• ).
• The authority core contains information that is not easily reproduced, so it may be best to dump and reload it (which may require building or adapting a tool).
• How might the other cores (oai, ???) be migrated, if need be?

This change complicates development and maintenance in cases where one wishes to use the same index content across different versions of DSpace.  How can we facilitate this?

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