title: Solr 4 Adding Shard to existing Cluster
body: <p><strong>Background:</strong> I just finished reading the <a href="http://www.packtpub.com/apache-solr-4-cookbook/book" rel="nofollow">Apache Solr 4 Cookbook</a>. In it the author  mentions that setting up shards needs to be done wisely b/c new ones cannot be added to an existing cluster. However, this was written using Solr 4.0 and at the present I am using 4.1. Is this still the case? I wish I hadn't found this <a href="https://issues.apache.org/jira/browse/SOLR-3755" rel="nofollow">issue</a> and I'm hoping someone can tell me otherwise.</p>
  
  <p><strong>Question:</strong> Am I expected to know how much data I'll store in the future when setting up shards in a SolrCloud cluster?
  I have played with <a href="http://www.datastax.com/dev/blog/cassandra-with-solr-integration-details" rel="nofollow">Solandra</a> and read up on <a href="http://www.elasticsearch.org/" rel="nofollow">elastic search</a>, but quite honestly I am a fan of Solr as it is (and its large community!). I also like Zookeeper. Am I stuck for now or is there a workaround/patch?    </p>
  
  <p><em><strong>Edit:</em></strong> If Question above is NO, could I build a SolrCloud with a bunch (maybe 100 or more) shards and let them grow (internally) and while I grow my data start peeling them off one by one and put them into larger, faster servers with more resources?</p>