anchor.diff:  % reply. A long interval also increases the likelihood that the server
   % crashes before the commit has finished successfully, making requests
   % more unreliable.
  --define(DELAYED_FLUSH_INTERVAL, 1 * ?SECOND).
  +-define(DELAYED_FLUSH_INTERVAL, (1 * ?SECOND)).
   
   % How long to wait between garbage collection runs.
   -define(GC_INTERVAL, ?DAY).
   
   % Max duration for a GC run.  This should be smaller than
   % min(ORPHANED_{BLOB,TAG}_EXPIRES).
  --define(GC_MAX_DURATION, 3 * ?DAY).
  +-define(GC_MAX_DURATION, (3 * ?DAY)).
   
   % How long to wait after startup for cluster to stabilize before
   % starting the first GC run.
  --define(GC_DEFAULT_INITIAL_WAIT, 5 * ?MINUTE).
  +-define(GC_DEFAULT_INITIAL_WAIT, (5 * ?MINUTE)).
   
   % Maximum number of times we try to bring up a node that failed during
   % GC before we abort GC.
  
positive.code: -define(FILE_MODE, 8#00400).
  
  % How often to check available disk space in ddfs_node.
  -define(DISKSPACE_INTERVAL, 10 * ?SECOND).
  
  % The maximum size of payloads of HTTP requests to the /ddfs/tag/
  % prefix.
  
negative.code: % This value _must_ be larger than the other time-related DDFS
  % parameters listed in this file.  In particular, it must be larger
  % than ORPHANED_TAG_EXPIRES.
  -define(DELETED_TAG_EXPIRES, (30 * ?DAY)).
  
  % How many times a tag operation should be retried before aborting.
  -define(MAX_TAG_OP_RETRIES, 3).
  