Database system for many read/writes per second <p>I'm going to write my project in the client-server architecture. The main part of the system will be a database storage. There will be tens of thousands read/write requests per second. The raw structure of database will be very simple and can be even simplified to the key-value pairs. I'm going to use one of the NoSql database for this purpose. I need your architectural advice if it will be suitable for such case. Now I think about Apache Couch DB or Mongo DB. What is your experience in this area? Thank you for any knowledge sharing.</p>