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": "total_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": 500000,
        "maxRunMinutes": 120
    },

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