anchor.diff:                        "max_size=~B;"
                         "tap_keepalive=~B;dbname=~s;"
                         "allow_data_loss_during_shutdown=true;"
  -                      "backend=couchdb;couch_bucket=~s;couch_port=~B;max_vbuckets=~B;"
  +                      "backend=couchdb;couch_bucket=~s;max_vbuckets=~B;"
                         "alog_path=~s;data_traffic_enabled=false;max_num_workers=~B;"
                         "uuid=~s;item_eviction_policy=~s",
                         [proplists:get_value(
  
positive.code:                          misc:getenv_int("MEMBASE_TAP_KEEPALIVE", 300)),
                         DBSubDir,
                         BucketName,
                         CouchPort,
                         NumVBuckets,
                         AccessLog,
                         NumThreads,
  
negative.code:         case BucketType of
              membase ->
                  {ok, DBSubDir} = ns_storage_conf:this_node_bucket_dbdir(BucketName),
                  AccessLog = filename:join(DBSubDir, "access.log"),
                  NumVBuckets = proplists:get_value(num_vbuckets, BucketConfig),
                  NumThreads = proplists:get_value(num_threads, BucketConfig, 3),
  