Before this project, it was possible to access timeseries data in the compressed format (buckets) by directly performing read/write on the bucket collection (<db>.system.buckets.<coll>).

This is not possible anymore. In fact, the bucket collection does not exist anymore. Instead, to access timeseries data in the compressed format (buckets) the CRUD operations must target the main timeseries user namespace and pass the "rawData: true" parameter.

E.g.:
db.runCommand(

)

Summary

Implement "raw access" mode for CRUD commands, which bypasses any logical translation steps. For standard collections, this will be a noop. For time-series collections, it allows operations to function on the bucket-level data while accessing the primary namespace (not system.buckets). This will allow tooling such as mongodump to access the correct data format without knowing the collection type.

Motivation

This small project will be a preparatory step for SPM-3830 (Eliminate Dual-Namespaces for Time Series Collections) to ease the transition to using a single namespace for time-series collections.

Documentation

Product Description
Scope
Technical Design
Docs Update