anchor.diff:  commitlog_sync: periodic
   commitlog_sync_period_in_ms: 10000
   
  +# The size of the individual commitlog file segments.  A commitlog
  +# segment may be archived, deleted, or recycled once all the data
  +# in it (potentally from each columnfamily in the system) has been
  +# flushed to sstables.
  +#
  +# The default size is 32, which is almost always fine, but if you are
  +# archiving commitlog segments (see commitlog_archiving.properties),
  +# then you probably want a finer granularity of archiving; 8 or 16 MB
  +# is reasonable.
  +commitlog_segment_size_in_mb: 32
  +
   # any class that implements the SeedProvider interface and has a
   # constructor that takes a Map<String, String> of parameters will do.
   seed_provider:
  
positive.code: # If omitted, Cassandra will set it to 1/3 of the heap.
  # memtable_total_space_in_mb: 2048
  
  # Total space to use for commitlogs. 
  # If space gets above this value (it will round up to the next nearest
  # segment multiple), Cassandra will flush every dirty CF in the oldest
  # segment and remove it.
  # commitlog_total_space_in_mb: 4096
  
  # This sets the amount of memtable flush writer threads.  These will
  
negative.code: #  - PropertyFileSnitch:
  #    Proximity is determined by rack and data center, which are
  #    explicitly configured in cassandra-topology.properties.
  #  - GossipingPropertyFileSnitch
  #    The rack and datacenter for the local node are defined in
  #    cassandra-rackdc.properties and propagated to other nodes via gossip.  If
  #    cassandra-topology.properties exists, it is used as a fallback, allowing
  #    migration from the PropertyFileSnitch.
  #  - RackInferringSnitch:
  #    Proximity is determined by rack and data center, which are
  #    assumed to correspond to the 3rd and 2nd octet of each node's
  