title: Oracle RAC standby - standby redo log configuration
body: <p>With an Oracle RAC standby DB where the primary has 2 threads of 4 groups of online redo logs, should the standby DB have 2 threads of 5 groups each? Or is just one additional group in one of the threads enough? Oracle recommends an extra group for standby's but I'm not sure if that means per thread or not. </p>
  
  <p>I just want to clarify what the Oracle standard is here. Many thanks.</p>