MongoDB C# driver 2.0 InsertManyAsync vs BulkWriteAsync

c# mongodb mongodb-.net-driver mongodb-csharp-2.0
Stefano Castriotta picture Stefano Castriotta · Oct 3, 2015 · Viewed 8.3k times · Source

I have to insert many documents in a MongoDB collection, using the new C# 2.0 driver. Is using either collection.InsertManyAsync(...) collection.BulkWriteAsync(...) making any difference? (particularly about performance).

From what i understand from MongoDB documentation, an insert with an array of documents should be a bulk operation under the hood. Is that correct?

Thanks for your help.

Answer

Stefano Castriotta picture Stefano Castriotta · Oct 3, 2015

I found the answer looking at the driver source code: the InsertManyAsync uses internally the BulkWriteAsync, so using InsertManyAsync it's the same as writing:

List<BsonDocument> documents = ...

collection.BulkWriteAsync(documents.Select(d => new InsertOneModel<BsonDocument>(d)));

Obviously, if all operations are Inserts, the InsertManyAsync should be used.

Related questions

Get All 'documents' from MongoDB 'collection'

I need to retrieve all the documents that are in my collection in MongoDB, but I cannot figure out how. I have declared my 'collection' like this- private static IMongoCollection<Project> SpeCollection = db.GetCollection<Project>("collection_…

Read More
MongoDB C# Driver 2.0 - Update document

I'm currently upgrading my code to MongoDB C# driver 2.0 and I'm having issues upgrading the code to update documents. using the old version I was able to do something like this: MyType myObject; // passed in var collection = _database.GetCollection<…

Read More
MongoDb c# driver find item in array by field value

i found the way to check is the value contains in simple array : var filter = Builders<Post>.Filter.AnyEq(x => x.Tags, "mongodb"); But how to find a complex item with many fields by a concrete field ? …

Read More