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Starting in version 3.2, MongoDB also provides the db.collection.bulkWrite() method for performing bulk write operations.



Adds an insert operation to a bulk operations list.

Bulk.insert() accepts the following parameter:

Parameter Type Description
doc document Document to insert. The size of the document must be less than or equal to the maximum BSON document size.


Insert Inaccuracies

Even if you encounter a server error during an insert, some documents may have been inserted.

After a successful insert, the system returns BulkWriteResult.nInserted, the number of documents inserted into the collection. If the insert operation is interrupted by a replica set state change, the system may continue inserting documents. As a result, BulkWriteResult.nInserted may report fewer documents than actually inserted.


The following initializes a Bulk() operations builder for the items collection and adds a series of insert operations to add multiple documents:

var bulk = db.items.initializeUnorderedBulkOp();
bulk.insert( { item: "abc123", defaultQty: 100, status: "A", points: 100 } );
bulk.insert( { item: "ijk123", defaultQty: 200, status: "A", points: 200 } );
bulk.insert( { item: "mop123", defaultQty: 0, status: "P", points: 0 } );