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From Guy Moshkowich <>
Subject Solr personalize document deletion.
Date Fri, 12 Sep 2014 09:15:30 GMT
I'm working on a production system that is indexing user's interaction 
events as documents in Solr index.
Each documents looks similar to: {user_id, event_data, update_time}
The index size increase monotonously over time and so documents need to be 
deleted from the index in fixed intervals.
A requirement for the deletion process is to delete documents so each user 
will be left with ~500 of the most updated documents (by update_time 
Another requirement is that deletion process needs to be efficient as 
there are millions of users and many documents that need to be deleted 
each time.

Can you advise on how can I implement such deletion mechanism?


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