Tag
state
- Nov 23, 2024 How a Session Identifier Binds Requests to Server State What the opaque string in a session cookie actually denotes, how much entropy it needs, and why the identifier and the record it points at have separate lifetimes. backend systems
- Nov 3, 2024 Keyed State Layout and the Cost of Keeping It What a keyed operator stores per key, how state backends trade heap for disk, and why a growing key space is the failure that has no trigger. data engineering
- Oct 15, 2024 Interval Joins Over Event Time Why a stream-stream join must buffer both sides, how the watermark of the slower input gates the match, and where the retained state actually goes. data engineering
- Feb 7, 2023 Checkpoint Barriers and Aligned Snapshots How a barrier injected at the source cuts a consistent snapshot across a distributed operator graph, and what alignment costs when one channel stalls. data engineering