Slack
Slack's Real-Time Backbone: Flannel and the Websocket Fleet
How Slack built the Flannel edge cache and a websocket gateway tier to hydrate huge workspaces instantly without hammering primary databases.
3 min read
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Slack
6 articles
Slack
Inside Slack's Incident Response and Operational Review Culture
How Slack structures incident severity, on-call response, and blameless postmortems to turn outages into durable operational improvements.
3 min read
Slack
Rewriting the Slack Desktop Client for a Multi-Workspace World
How Slack rebuilt its Electron desktop app's architecture to support switching between many workspaces without the memory and performance problems piling up.
3 min read
Slack
Outgrowing the Workspace: Slack's Move to Fine-Grained Sharding
How Slack's original one-workspace-per-shard data model buckled under Enterprise Grid and giant workspaces, and why finer-grained sharding replaced it.
3 min read
Slack
How Slack Used Vitess to Scale MySQL Without Leaving SQL
Why Slack adopted Vitess to shard MySQL horizontally at the connection-pooling and proxy layer instead of migrating off relational storage entirely.
3 min read
Slack
Slack's Job Queue Overhaul: From Redis to Kafka
Why Slack outgrew a Redis-backed job queue as its job volume and job diversity exploded, and what moving the queue to Kafka bought in return.
3 min read