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{ dist sys, formal verification, event streaming }.
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Apache Kafka performance #1 - linger.ms
This is the first in an ongoing ad-hoc series of posts on Apache Kafka performance. I have no general direction, I'll just share interesting insights based on the performance testing I do on Apache Kafka.Recently I was curious to see if there was any gene
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1BRC on a Threadripper 9980X
Yesterday I published some benchmarks of Hardwood 1.0 on my Threadripper. Someone suggested I run the One Billion Row Challenge too, to see how it does, so here it is!Gunnar Morling ran the original benchmarks on an EPYC 7502P, Zen 2, 32 cores with 128 GB
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Benchmarking Hardwood 1.0 on a Threadripper 9980X
Hardwood is a minimal-dependency Java library for reading Parquet files. It currently has row-reader and columnar-reader APIs, with Parquet writing planned for the future.Gunnar Morling, Hardwood's author, published some initial benchmarks in the v1.0 ann
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Kafka Share Groups - Pathological fetch waits with record_limit
In this post we're going to see how share.acquire.mode=record_limit combined with:fewer consumers than partitionsand various cases of "partition skew"…can result in subpar performance with share groups. I stumbled on these issues when running large sets o
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Can We Agree on a Storage/Workload Architecture Taxonomy?
The lines between transactional systems, analytical systems, hybrid systems, and shared storage architectures are getting blurry. This post proposes a small taxonomy for describing the different ways systems, workloads, storage tiers, visibility, and dura
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