title: Improve solrCloud search : two architectures
body: <p>I know solr search is I/O bound, if I have 4 node cluster and have an index separated into 4 blocks, which architecture below will have a better search performance :</p>
  
  <p>1) Have 4 solr instances running in ONE single node and put each block of index over these 4 solr instances
  2) Have a solr instances running in each node, hence total of 4-node cluster, and put each block of index into each solr instance.</p>
  
  <p>Thanks!</p>