SOLR-3221 added the ability to configure the shard handler in Solr. In particular, increasing maxConnectionsPerHost is important for scalability, and many people might want to enable fairnessPolicy.
http://wiki.apache.org/solr/SolrConfigXml#Configuration_of_Shard_Handlers_for_Distributed_searches What I'm wondering is whether there might be a more global way to configure this, so it doesn't need to be done on every request handler. Ideally, it would be possible to configure this in one place for all cores, but a config option for every core (solrconfig.xml) would work too. Does each request handler get its own HttpClient, or is there one per core? I know there is one HttpClient per HttpShardHandlerFactory and all HttpShardHandler instances generated by that factory share the HttpClient. I don't know if there's one factory per handler, or one factory per core. Side note: Java seems to have a really odd idea of what "fair" means when it comes to a queue. In other contexts, you have a choice between FIFO, fair, and others. With java, fair seems to mean FIFO. http://en.wikipedia.org/wiki/Fair_queuing http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/SynchronousQueue.html#SynchronousQueue%28boolean%29 Thanks, Shawn
