Use Case

As a driver engineer,
I want the legacy bulk API to build batches after connection checkout,
So that we use accurate hello metadata for batching logic in load balanced mode.

As a driver user,
I want the legacy bulk API to build batches after connection checkout,
So that I do not need to be connected to build bulk operations using the legacy bulk write API.

User Experience

• Users will see errors related to document size when a bulk operation is executed instead of when the batch is constructed.

Dependencies

• Must be done after NODE-6404.

Risks/Unknowns

• Bulk operations are used for insertMany - a critical code path. We should be careful to ensure performance does not regress when making this change.

Acceptance Criteria

Implementation Requirements

• Instead of building batches of commands before executing a bulk operation, lazily build batches after connection checkout.
  • The client bulk write method already does this and could be used as an implementation reference.
• Obtain relevant server metadata used in building batches from the checked out connection

Testing Requirements

• Ensure existing tests pass.

Documentation Requirements

• n/a

Follow Up Requirements

• n/a