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Distributed Systems

Articles and publications tagged Distributed Systems across the Atmosphere.

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Articles

Publications

Redowan's Reflections

Redowan's ReflectionsAug 19, 2026

Postgres as an isolation reference model

Use PostgreSQL's transaction isolation levels as a reference model for reasoning about the guarantees and tradeoffs of other relational and non-relational databases.

Redowan's Reflections

Redowan's ReflectionsAug 19, 2026

A return to Postgres isolation

Use PostgreSQL's transaction isolation levels as a reference model for reasoning about the guarantees and tradeoffs of other relational and non-relational databases.

permablog

permablogAug 13, 2026

How I got a rare GitHub t-shirt

and why they're getting harder to find

securitycybersecurity

Redowan's Reflections

Redowan's ReflectionsJun 27, 2026

Request coalescing with Go singleflight

A hot cache key expires and a hundred requests issue the same query at once, saturating the database. Go's singleflight package coalesces those duplicate calls into one. How to wire it up, how to measure whether it's firing, and why per-pod coalescing is usually enough.

Redowan's Reflections

Redowan's ReflectionsJun 13, 2026

Reading your own writes with WAIT FOR LSN in Postgres 19

PostgreSQL 19's new WAIT FOR LSN command lets a replica block until it has replayed your write. The read-after-write problem it solves, the workarounds it replaces, and what the timeout, status, and mode options are actually for.

Redowan's Reflections

Redowan's ReflectionsJun 13, 2026

Reading your own writes with WAIT FOR LSN in Postgres 19

PostgreSQL 19's new WAIT FOR LSN command lets a replica block until it has replayed your write. The read-after-write problem it solves, the workarounds it replaces, and what the timeout, status, and mode options are actually for.

Alessandro Bahgat

Alessandro BahgatMay 31, 2026

The nearest hospital to every place on Earth, in a single S2 range query

For every locality on Earth, how far is the nearest hospital? Naively, that's 437 billion great-circle distances. S2 cell indexing reduces it to a single integer range-join: build the index once, and the answer for every place on Earth comes back in seconds. The same primitive also resolves which country, region, and locality each hospital belongs to, in a single pass over one index.

algorithmsspatial

waowMay 26, 2026

typeahead? more like typebehind! amirite

typeahead.waow.tech is an independent, free-to-use typeahead service used by several atproto apps today operating it thus far has been not the worst! i seeded the index by listening to select collections from jetstream and following bsky moderation events. i use turso.tech bc it rocks and i synced a read-replica to the backend machine to avoid extra turso reads... same playbook as pub-search.. which was fine until it was not! yes. yes, it was. ty for reporting! (pckt is our second biggest user!)

atprotoindexing

Mahib's MarginsApr 13, 2026

Gateway pattern for external service calls

Separate business logic from external service calls using the Gateway pattern. Apply dependency inversion and interface segregation in Go.

GoDistributed Systems

Redowan's Reflections

Redowan's ReflectionsApr 11, 2026

Dynamo: Amazon's highly available key-value store

Key takeaways from Amazon's 2007 Dynamo paper.

Distributed SystemsDatabases

Redowan's Reflections

Redowan's ReflectionsApr 7, 2026

Stacked log lines considered harmful

Why logging at every layer of a service produces noise, and how to log only at the handler level while propagating context from below.

GoDistributed Systems

Redowan's Reflections

Redowan's ReflectionsMar 23, 2026

Testing unary gRPC services in Go

How to test unary gRPC services in Go - handler logic, interceptors, deadlines, metadata propagation, and rich error details - all in-memory with bufconn.

Redowan's Reflections

Redowan's ReflectionsMar 18, 2026

Is passing user ID through context an antipattern?

Why the middleware-to-handler boundary is a special case for context values.

Redowan's Reflections

Redowan's ReflectionsMar 17, 2026

What belongs in Go's context values?

A simple litmus test for when to use context values in Go.

Redowan's Reflections

Redowan's ReflectionsMar 15, 2026

Wrapping a gRPC client in Go

How to wrap a generated gRPC client behind a clean Go API so users never have to touch protobuf types or connection management directly.

Redowan's Reflections

Redowan's ReflectionsMar 14, 2026

In praise of the etcd codebase

Why the etcd codebase is my go-to reference for building gRPC services in Go.

Devtools FM

Devtools FMJan 12, 2026

Peter van Hardenberg - Ink and Switch, Automerge

Peter van Hardenberg from Ink and Switch discusses the origins of local-first software and Automerge, their CRDT-based sync engine for real-time collaboration.

automergeink and switch

Redowan's Reflections

Redowan's ReflectionsDec 13, 2025

Tap compare testing for service migration

Master shadow testing for large-scale system migrations. Learn to safely rewrite services by comparing outputs between old and new implementations.

Distributed SystemsGo

Redowan's Reflections

Redowan's ReflectionsAug 3, 2025

Gateway pattern for external service calls

Separate business logic from external service calls using the Gateway pattern. Apply dependency inversion and interface segregation in Go.

GoDistributed Systems

Redowan's Reflections

Redowan's ReflectionsSep 21, 2024

Notes on building event-driven systems

Deep dive into event-driven architecture patterns. Learn publish-subscribe, CQRS, outbox pattern, eventual consistency, and handling microservice coupling.

NetworkingDistributed Systems

Redowan's Reflections

Redowan's ReflectionsMay 10, 2024

Protobuffed contracts

Define service contracts with Protocol Buffers for non-gRPC systems. Generate serializers, maintain self-documented APIs, and ensure cross-language compatibility.

Devtools FM

Devtools FMFeb 19, 2024

Glauber Costa - Forking SQLite and Building a Distributed Database with Turso

Glauber Costa explains how Turso forks SQLite into libSQL to create a distributed database, drawing from his Linux kernel development experience.

Devtools FM

Devtools FMDec 15, 2022

Rúnar Bjarnason - Unison

Rúnar Bjarnason introduces Unison, a functional programming language with content-addressed code for distributed systems.

programmingprogramming languages

dev.log

dev.logJun 13, 2021

Construction Ahead, Hard Hats Required

As an undergrad, the last four years have been a journey of realization and final year was no less...