As we countdown to the annual Lucene/Solr Revolution conference in Boston this October, we’re highlighting talks and sessions from past conferences. Today, we’re highlighting Gregg Donovan’s session, “Lessons from Sharding Solr at Etsy”.

Gregg covers the following lessons learned at Etsy while sharding Solr: How to enable SolrJ to handle distributed search fanout and merge; How to instrument Solr for distributed tracing so that distributed searches may be better understood, analyzed, and debugged; Strategies for managing latency in distributed search, including tolerating partial results and issuing backup requests in the presence of lagging shards.

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Gregg Donovan is a Senior Software Engineer at in Brooklyn, NY, working on the Solr and Lucene infrastructure that powers more than 120 million queries per day. Gregg spoke at Lucene/Solr Revolution 2015 in Austin, Lucene Revolution 2011 in San Francisco, Lucene Revolution 2013 in San Diego, and previously worked with Solr and Lucene at

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