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    How to upgrade SOLR 4.10.4 to SOLR 6.1.0?

    How to upgrade SOLR 4.10.4 to SOLR 6.1.0?



    Download solr-5.0.0 and start it.
    From the GUI  create all collections
    copy index data from 4.x to 5.0
    Then optimize all collections
    stop solr 5.0 and download and start solr 6.x
    create all collections in solr 6.x
    copy all index files from 5.0 to 6.x
    optimize all collections and you should be ready.

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