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[rdf4j-dev] upgrade flag for stores ?
  • From: "Bart Hanssens (BOSA)" <bart.hanssens@xxxxxxxxxxxx>
  • Date: Thu, 15 Apr 2021 09:46:53 +0000
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  • Thread-topic: upgrade flag for stores ?

Hi,

 

Working on the LuceneSail and ElasticSearch updates (probably for 4.0), I’ve looked into upgrading existing Lucene indices.

This boils down to a full Lucene reindexing, which can be done either using a lucene tool outside RDF4J, or programmatically in the RDF4J Sail.

I guess the same can be done in ElasticSearch and IIRC there is also some NativeStore code in place to perform an upgrade from an older (Sesame) version,

 

Reindexing a Lucene index can be a lengthy process, and may not be strictly necessary (even though it is recommended by the Lucene developers).

It can also fail in some special cases e.g. when wrapped in a read-only sail.

 

So I was wondering if there would be a use for a more generic update flag / environment variable to only upgrade/reindex… whatever type of store when explicitly set ?

 

 

Best regards

 

Bart

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