title: HBase rowkey which includes timestamp
body: <p>I would like to whether it is bad to have rowkeys like the following:</p>
  
  <p>username-timestamp</p>
  
  <p>This rows would be read from MapReduce jobs and will be put using java client API. Also, a subset would be selected using STARTROW, ENDROW.</p>
  
  <p>On one side this seems convinient for my usecase since I can scan for specific interval and rows arebmostly subsequent for MR job, while on the other I read that it is good to avoid long rowkeys and hotspoting.</p>
  
  <p>Is there really a problem with this design and how to overcome it?</p>
  
  <p>I'm new to HBase so any help would be great.</p>