Package io.airlift.stats.cardinality

Class HyperLogLog

  • public class HyperLogLog
extends Object

    • Method Detail

      • newInstance

        public static HyperLogLog newInstance​(int numberOfBuckets)

      • newInstance

        public static HyperLogLog newInstance​(io.airlift.slice.Slice serialized)

      • add

        public void add​(long value)

      • add

        public void add​(io.airlift.slice.Slice value)

      • addHash

        public void addHash​(long hash)
        Adds a value that has already been hashed to the set of values tracked by this HyperLogLog instance.
        Parameters:
        hash - The hash should be the 64 least significant bits of the murmur3_128 hash of the value. For example: io.airlift.slice.Murmur3.hash64(value).

      • mergeWith

        public void mergeWith​(HyperLogLog other)

      • cardinality

        public long cardinality()

      • estimatedInMemorySize

        public int estimatedInMemorySize()

      • estimatedSerializedSize

        public int estimatedSerializedSize()

      • serialize

        public io.airlift.slice.Slice serialize()

      • makeDense

        public void makeDense()