When should I consider using a in memory database and what are the issue to look out for?

Question

I was just think that now it is common to have enough RAM on your database server to cache your complete database why are the specialist in memory database (e

Answer 1

The most typical use-case for a database is persistence, which makes most in-memory databases unsuitable. One popular reason to use an in-memory database is for testing purposes. But this requires you use either a database that can be set up both as in-memory and something else.

Popular choices in this area seems to be RavenDB for .Net developers and OrientDB for Java developers. Because both can function as in-memory databases, and "something else" depending on configuration, so you can use one or the other depending on your configuration (app.config in .Net, Maven or Ant settings in Java).