Hi Jiunn, Thanks for the KIP.
poan_00: In example usage, there is a case use --key-distribution range with --random-seed. In this case, does the --random-seed parameter take effect? If not, can we remove it? poan_01: In motivation, one use case of random distribution is hot-partition scenario. However, in JDK document, the SplittableRandom is a generator of uniform pseudorandom values [0]. If hot-partition scenario is just because small key range, can we do it with range key distribution directly? https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/SplittableRandom.html Best, PoAn > On May 20, 2026, at 8:56 PM, 黃竣陽 <[email protected]> wrote: > > Hi chia, > > Thanks for the feedback, > > chia_00: I have added a new optional argument --random-seed <SEED> (default: > 0) > to let users set the seed manually. The default value of 0 ensures > deterministic, reproducible > benchmark runs by default. > > chia_01: I have updated the Motivation section in the KIP to elaborate on the > practical > use cases for each key distribution mode. > > Best Regards, > Jiunn-Yang > >> Chia-Ping Tsai <[email protected]> 於 2026年5月20日 上午11:48 寫道： >> >> hi Jiunn >> >> thanks for this KIP! >> >> chia_00: Regarding the random seed, what are your thoughts on its >> initialization? >> >> chia_01: Could you elaborate on the practical use cases for each key >> distribution mode in the Motivation section? >> >> Best,Chia-Ping >> >> On 2026/03/30 13:06:05 黃竣陽 wrote: >>> Hello everyone, >>> >>> I would like to start a discussion on KIP-1299 Use key range in >>> ProducerPerformance >>> <https://cwiki.apache.org/confluence/x/XpQ8G> >>> >>> This proposal aims to add configurable key distribution support to >>> kafka-producer-perf-test. >>> Currently, the tool always produces records with null keys, which does not >>> reflect real-world >>> keyed workloads. This KIP introduces two new arguments — --key-distribution >>> and --message-key-range >>> — enabling engineers to benchmark with round-robin or random key strategies >>> over a bounded >>> key space, providing more realistic performance measurements. >>> >>> Best regards, >>> Jiunn-Yang >
