This directory contains the Prometheus TSDB (Time Series DataBase) library, which handles storage and querying of all Prometheus v2 data.

• Data format.
• Usage.
• Bstream details.

• A writeup of the original design can be found here.
• Video: Storing 16 Bytes at Scale from PromCon 2017.
• Compression is based on the Gorilla TSDB white paper.

A series of blog posts explaining different components of TSDB:

• The Head Block
• WAL and Checkpoint
• Memory Mapping of Head Chunks from Disk
• Persistent Block and its Index
• Queries
• Compaction and Retention
• Snapshot on Shutdown