The Big Data Real-time Application is a scenario to return the computation and analysis results in real time even if there are huge amounts of data. This is an emerging demand on database applications in recent years.
In the past, because there wasn’t a lot of data, the computation was simple, and few parallelisms, the pressure on the database wasn’t great. A high-end or middle-range database server or cluster could allocate enough resources to meet the demand. Moreover, in order to rapidly and parallel access to the current business data and the historic data, users also tended to arrange the same database server for both the query analysis system and the production system. This way, the database cost could be lowered, the data management streamlined, and the parallelism ensured to some extent. We are in the prime time of database real-time application development.