title: Solr master-master replication alternatives?
body: <p>Currently we have 2 servers with a load-balancer before them. We want to be able to turn 1 machine off and later on, without the user noticing it.
  Our application also uses solr and now i wanted to install &amp; configure solr on both servers and the question is how do i configure a master-master replication?</p>
  
  <p>After my initial research i found out that it's not possible :(
  But what are my options here? I want both indices to stay in sync and when a document is commited on one server it should also go to the other.</p>
  
  <p>Thanks for your help!</p>