Is it normal to use LocalDb in production?

Question

I know that using LocalDb is very good and easy for developement, I wonder if it's good idea to use it in production when I host websites on IIS server?

I'm asking because I wonder if it won't have any kind of speed issues in production.

This is my connection string that I want to use in production

Server=(LocalDB)\\v11.0;Integrated Security=SSPI;MultipleActiveResultSets=true;
AttachDBFilename=|DataDirectory|ProjectDB.mdf;

Answer 1

LocalDB is absolutely supported in production. From the performance point of view it is identical to SQL Server Express, as they share the same database engine.

Now, for a site running in full IIS I would recommend using service-based instance of SQL Server Express. Since IIS is running as a service it is best to have a service-hosted database as well. That means you should not be using User Instance=true or AttachDbFileName=... in your connection string.

If you want to learn more, I recommend this post on using LocalDB from full IIS, part 1 and its follow up, part 2. They go into more details.