anchor.diff:     final ExcerptAppender appender = queue.acquireAppender();
   ----
   
  -This the highest level API which hides the fact you are writing to messaging at all. The benefit is; you can swap calls to the interface with a real component or an interface to a different protocol.
  +This is the highest level API which hides the fact you are writing to messaging at all. The benefit is; you can swap calls to the interface with a real component or an interface to a different protocol.
   
   [source, Java]
   ----
  
positive.code: - you have either one input, or you can always determine the order the inputs were consumed.
  - you have not changed the software (or all the software is stored in the queue)
  
  If you want to be able to upgrade your system you want o replay for the output.
  
  Replaying from the output means;
  
  
negative.code: 
  === Compression
  
  Replication for Chronicle Queue supports Chronicle Wire Enterprise. This supports a real time compression which calcuates the deltas for individual objects as they are written. This can reduce the size of messages bto 1/10th or better without the need for batching i.e without introducing significant latency.
  
  Queue also supports LZW, Snappy and GZIP compression however these add non-triviallatency.  These are only useful if you have have strick limitations on network bandwidth.
  
  === Delivery Mode Semantics
  
  Chronicle Queue supports a number of symantics.
  
  - every message is replayed on restart
  - only new messages are played on restart.
  - restart from any known point using the index of the entry.
  - replay only messages you have missed. This is supported directly using the methodReader/methodWriter builders.
  
  === Detailed tracing of timings.
  
  Chronicle Queue supports explicit or implicit nano-second resolution timing for messages as they pass end to end over across your system. We support using nanotime across machine without the need for specialist hardware.
  
  .Enabling high resolution timings
  [source, Java]
  