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0b14fdb078
Reorganize existing READMEs and other documentation files into mdbook format. The resulting Table of Contents is a mix of placeholders for docs that we should write, and documentation files that we already had, dropped into the most appropriate place. Update the Pageserver overview diagram. Add sections on thread management and WAL redo processes. Add all the RFCs to the mdbook Table of Content too. Per github issue #1979
467 B
467 B
Page server architecture
The Page Server has a few different duties:
- Respond to GetPage@LSN requests from the Compute Nodes
- Receive WAL from WAL safekeeper, and store it
- Upload data to S3 to make it durable, download files from S3 as needed
S3 is the main fault-tolerant storage of all data, as there are no Page Server replicas. We use a separate fault-tolerant WAL service to reduce latency. It keeps track of WAL records which are not synced to S3 yet.