#distributed-systems

3 post(s)

Raft:Elect a Leader and Replicate a Log (Awareness, Not a From-Scratch Cluster)

Raft terms, leader election, and log replication at awareness depth — enough to know what etcd and Kafka-adjacent consensus are doing, not enough to ship your own cluster.

Algorithms

Two-Phase Commit:All Prepare, Then All Commit — and Why It Blocks

A coordinator asks every participant to prepare, then commit or abort together — and why a crashed coordinator leaves the cluster stuck.

Algorithms

Consistent Hashing:Move Few Keys When a Node Joins or Dies

Place keys on a ring so adding or removing a node remaps only its neighbors — not every key — with virtual nodes to even the load.