Tuning Guide
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PCAP Tuning

PCAP is a specialized topology that is a Spout-only topology. Both Kafka topic consumption and HDFS writing is done within a spout to avoid the additional network hop required if using an additional bolt.

General Storm topology properties

topology.workers=16
topology.ackers.executors: 0                              
                                

Spout and Bolt Properties

kafkaSpout
    parallelism: 128
    poll.timeout.ms=100
    offset.commit.period.ms=30000
    session.timeout.ms=39000
    max.uncommitted.offsets=200000000
    max.poll.interval.ms=10
    max.poll.records=200000
    receive.buffer.bytes=431072
    max.partition.fetch.bytes=10000000
    enable.auto.commit=false
    setMaxUncommittedOffsets=20000000
    setOffsetCommitPeriodMs=30000
                                
writerConfig
    withNumPackets=1265625
    withMaxTimeMS=0
    withReplicationFactor=1
    withSyncEvery=80000
    withHDFSConfig
        io.file.buffer.size=1000000
        dfs.blocksize=1073741824