Random thoughts on concurrency, databases and distributed systems

Random thoughts on concurrency, databases and distributed systems

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Andrei Pechkurov

Andrei Pechkurov

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Core database engineer at QuestDB. Distributed systems gazer. Node.js contributor. Occasional tech blogger and speaker.

Multithreaded Scatter-Gather Execution Model for Analytical Queries

Today we'll be discussing an approach used in some analytical databases to speed up the execution of queries at the cost of additional HW resources,...

Multithreaded Scatter-Gather Execution Model for Analytical Queries

BuzzwordBusters: What Does Lock-Free, Wait-Free Really Mean?

It seems to be a common belief that code which uses mutexes/locks/synchronized methods is "slow" and, as soon as you replace them with atomics, your...

BuzzwordBusters: What Does Lock-Free, Wait-Free Really Mean?

Concurrent Map in Go vs Java: Yet Another Meaningless Benchmark

Today we're comparing Java's j.u.c.ConcurrentHashMap and Go's xsync.MapOf in a totally non-scientific, unfair benchmark. While most of such language...

Concurrent Map in Go vs Java: Yet Another Meaningless Benchmark

Thread-Local State in Go, Huh?

We all know that there is no such thing as thread-local state in Go. Yet, there is a trick that would help you to retain the thread identity at least...

Thread-Local State in Go, Huh?

So long, sync.Map

While the title is certainly a clickbait, I definitely don't see any strong reason to keep dealing with sync.Map if you're a Go generics user....

So long, sync.Map

Testing Concurrent Code for Fun and Profit

Everyone knows that multi-threaded code is not a piece of cake. There are lots of publications on how to write concurrent code properly and also lots...

Testing Concurrent Code for Fun and Profit