Bulk Operations

Introduction

Bulk operations let you batch many writes into one network round-trip. The bulkWrite API supports mixed insert/update/delete with ordered or unordered execution.

Syntax reference

db.users.bulkWrite([
  { insertOne: { document: { name: "A" } } },
  { updateOne: { filter: { _id: 1 }, update: { $set: { active: true } } } },
  { deleteOne: { filter: { _id: 9 } } }
], { ordered: false });

Real-world use

ETL pipelines and event ingestion lean heavily on bulkWrite — 10-100× faster than per-document calls.

Best practices

• Batch in chunks of 1000-5000 operations.
• Use ordered: false for max throughput.