Description

In the Multithreaded Replication section in Replica Set Data Synchronization it still says:

While applying a batch, MongoDB blocks all read operations. As a result, secondary read queries can never return data that reflect a state that never existed on the primary.

which has changed since 4.0, since we implemented reading from snapshots to allow returning consistent data.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)