anchor.diff:  This run sets the timeout value to 60 seconds, the default value is 600 seconds.
   
   ----
  -$ ${HBASE_HOME}/bin/hbase canary -t 600000
  +$ ${HBASE_HOME}/bin/hbase canary -t 60000
   ----
   
   ==== Enable write sniffing in canary
  
positive.code: $ ${HBASE_HOME}/bin/hbase canary -daemon
  ----
  
  Run repeatedly with internal 5 seconds and will not stop itself even if errors occur in the test.
  
  ----
  $ ${HBASE_HOME}/bin/hbase canary -daemon -interval 50000 -f false
  ----
  
  ==== Force timeout if canary test stuck
  
negative.code: === Canary
  
  There is a Canary class can help users to canary-test the HBase cluster status, with every column-family for every regions or RegionServer's granularity.
  To see the usage, use the `-help` parameter.
  
  ----
  $ ${HBASE_HOME}/bin/hbase canary -help
  