title: How to get value from IMAP (hazelcast) given the list of keys?
body: <p>Problem we are trying to solve:
  Give a list of Keys, what is the best way to get the value from IMap given the number of entries is around 500K?</p>
  
  <p>Also we need to filter the values based on fields.</p>
  
  <p>Here is the example map we are trying to read from.</p>
  
  <p>Given <code>IMap[String, Object]</code>
  We are using protobuf to serialize the object
  Object can be say</p>
  
  <pre><code>Message test{ Required mac_address eth_mac = 1, ….// size can be around 300 bytes }
  </code></pre>