title: rocksdb in multithreaded environment
body: <p>I'm using rocksdb in a multithreaded environment.</p>
  
  <p>All of my threads are doing <code>get()</code>, <code>put()</code> and <code>merge()</code> operations, potentially with the same keys.</p>
  
  <p>Is rocks providing me with any built in synchronization? Is it configurable? I've gone through documentation and source code, but couldn't figure it out for certain.</p>