Github user Ethanlm commented on the issue:
https://github.com/apache/storm/pull/2270
Another Performance testing on ConstSpoutNullBoltTopo.
1. Config: `topology.message.timeout: 300; topology.max.spout.pending:
5000;`
2. 2 VM's as always
3. Launched `4 workers`, `2 spout tasks` and `2 bolt tasks`. ACKing enabled.
4. All experiments ran 300s.
5. For clarity, only show the outputs at 240s.
6. Numbers fluctuate slightly during the experiments.
Spout and bolt location like this:
#### Experiment 1: No additional network latency
Grouping | spout_transferred | spout_acks | spout_throughput (acks/s) |
spout_avg_complete_latency(ms)
-- | -- | -- | -- | --
LocalityASG | 30810940 | 30810260 | 513515 | 4
LocalOrShuffle(loadaware disabled) | 28185400 | 28182380 | 469756 | 4.7
Shuffle (loadaware disabled) | 30276400 | 30277660 | 504606 | 5
LocalOrShuffle | 27928660 | 27926100 | 465477 | 4.5
Shuffle | 29197460 | 29204280 | 486624 | 4.2
#### Experiment 2: 20ms network latency
Grouping | spout_transferred | spout_acks | spout_throughput (acks/s) |
spout_avg_complete_latency(ms)
-- | -- | -- | -- | --
LocalityASG | 26532600 | 26535020 | 442210 | 3.3
LocalOrShuffle(loadaware disabled) | 13883300 | 13880840 | 231388 | 23.8
Shuffle (loadaware disabled) | 14067160 | 14065380 | 234452 | 22.9
LocalOrShuffle | 13868000 | 13865340 | 231133 | 23.3
Shuffle | 13892060 | 13892460 | 231534 | 23.1
#### Experiment 3: 100ms network latency
Grouping | spout_transferred | spout_acks | spout_throughput (acks/s) |
spout_avg_complete_latency(ms)
-- | -- | -- | -- | --
LocalityASG | 5561480 | 5558060 | 92691 | 26.4
LocalOrShuffle(loadaware disabled) | 2937220 | 2934380 | 48953 | 125
Shuffle (loadaware disabled) | 2935220 | 2934860 | 48920 | 125.1
LocalOrShuffle | 2934980 | 2933620 | 48916 | 125.1
Shuffle | 2934060 | 2935580 | 48901 | 125.4
It's clear to see that `LocalityAwareShuffleGrouping` performs best in this
situation. The results are much more clear when there are some network latency.
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