db.collection.initializeUnorderedBulkOp()

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Definition

Behavior
Example

Tip

MongoDB also provides the db.collection.bulkWrite() method for performing bulk write operations.

Definition

db.collection.initializeUnorderedBulkOp(): Important
mongosh Method
This page documents a mongosh method. This is not the documentation for a language-specific driver, such as Node.js.
For MongoDB API drivers, refer to the language-specific MongoDB driver documentation.
Initializes and returns a new Bulk() operations builder for a collection. The builder constructs an unordered list of write operations that MongoDB executes in bulk.

Behavior

Order of Operation

With an unordered operations list, MongoDB can execute in parallel the write operations in the list and in any order. If the order of operations matter, use db.collection.initializeOrderedBulkOp() instead.

Execution of Operations

When executing an unordered list of operations, MongoDB groups the operations. With an unordered bulk operation, the operations in the list may be reordered to increase performance. As such, applications should not depend on the ordering when performing unordered bulk operations.

Bulk() operations in mongosh and comparable methods in the drivers do not have a limit for the number of operations in a group. To see how the operations are grouped for bulk operation execution, call Bulk.getOperations() after the execution.

Tip

Error Handling

If an error occurs during the processing of one of the write operations, MongoDB will continue to process remaining write operations in the list.

Example

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

var bulk = db.users.initializeUnorderedBulkOp();
bulk.insert( { user: "abc123", status: "A", points: 0 } );
bulk.insert( { user: "ijk123", status: "A", points: 0 } );
bulk.insert( { user: "mop123", status: "P", points: 0 } );
bulk.execute();