Solr: Backed up? Now you can restore it back

One of the lesser known but cool features of ReplicationHandler is the support it provides for index backup. You must have used ReplicationHandler in your project for replicating index from master to slave instances....

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Solr Optimistic Concurrency Unlocked!

If you have multiple clients updating documents, it's really critical to ensure that the newer version of the document is never overwritten by the older version. To address this problem, what you need is concurrency...

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