title: ElasticSearch Multiple Data Directories, choose where to place the index
body: <p>I'm running ElasticSearch over multiple servers. All servers are equal, all have 2 disks: one SSD, and one HDD. Needless to say, the SSD is faster yet smaller. </p>
  
  <p>I know you can set multiple data directories in ES by added the paths to <code>elasticsearch.yml</code>. But, by default, (from what I've found) ES automatically chooses which data directory to take based on the percentage of disk space available.</p>
  
  <p>Some indices are more important to me than others, say newer ones (those that get queried a lot) need to be on the SSD, and those that will be queried less can be on HDD.</p>
  
  <p>What do I need to do to get this done - if possible at this time?<br/>
  Add index to path?</p>