druid/examples/twitter/twitter_realtime.spec

[{
  "schema" : { "dataSource":"twitterstream",
               "aggregators":[ 
                       {"type":"count", "name":"tweets"},
    	       		       {"type":"doubleSum","fieldName":"follower_count","name":"total_follower_count"},
    	       		       {"type":"doubleSum","fieldName":"retweet_count","name":"tota_retweet_count"},
    	       		       {"type":"doubleSum","fieldName":"friends_count","name":"total_friends_count"},
	          		       {"type":"doubleSum","fieldName":"statuses_count","name":"total_statuses_count"},

	       	    	       {"type":"min","fieldName":"follower_count","name":"min_follower_count"},
	       		           {"type":"max","fieldName":"follower_count","name":"max_follower_count"},

	       		           {"type":"min","fieldName":"friends_count","name":"min_friends_count"},
	       		           {"type":"max","fieldName":"friends_count","name":"max_friends_count"},

	       		           {"type":"min","fieldName":"statuses_count","name":"min_statuses_count"},
	       		           {"type":"max","fieldName":"statuses_count","name":"max_statuses_count"},

	       		           {"type":"min","fieldName":"retweet_count","name":"min_retweet_count"},
	       		           {"type":"max","fieldName":"retweet_count","name":"max_retweet_count"}
               ],
               "indexGranularity":"minute",
	             "shardSpec" : { "type": "none" } },
  "config" : { "maxRowsInMemory" : 50000,
               "intermediatePersistPeriod" : "PT2m" },
 
  "firehose" : { "type" : "twitzer",
                 "maxEventCount": 50000,
                 "maxRunMinutes" : 10
                },

  "plumber" : { "type" : "realtime",
                "windowPeriod" : "PT3m",
                "segmentGranularity":"hour",
                "basePersistDirectory" : "/tmp/twitter_realtime/basePersist" }
}]