Is there a way to check for insert errors on the mongodb database when using writeconcern 0 unacknowledged?

Question

My system requires heavy database writes from thousands of requests per second. In order to minimize response times, I've started to learn about write concerns, and using the unacknowledged / writeconcern 0 will help, however as expected in its "fire and forget" mode, the application will not know if there are any issues. I would like to know if there is a way to monitor or notify if there are any errors. I don't necessarily have to know exactly which writes failed, just the number of failures. The solution doesn't have to be C#, and could run on the database server itself (as opposed to the application server).

My environment is the latest C# driver and latest MongoDb as of Dec 7, running on Ubuntu 14.04. Application server is Windows 2012/IIS8 ASP.NET C#.

score 0 · Answer 1 · edited Jun 20 '20 at 09:12

0

No. That is the point of setting acknowledge to false. It increases speed but the down side is that you don't get acknowledgement as well as _id if data is inserted successfully. What one can do is fetch data to check.

Example

db.hobbies.insertOne({name: "Dancing"}, {writeConcern: {w: 0}})
db.hobbies.find().pretty()

edited Jun 20 '20 at 09:12

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answered Jul 27 '19 at 20:10

Is there a way to check for insert errors on the mongodb database when using writeconcern 0 unacknowledged?

1 Answers1

Example