Types of real time databases

Types of real time databases - What are the types of real-time databases? - Various types of real time databases with respect to transaction deadline - Hard real-time database - Soft real-time database

Types of Real-Time Databases (with respect to transaction deadline)

The type of a real-time database is determined by its transaction characteristics. Especially the deadline of a transaction determines the type. Based on the transaction deadline or when a transaction has to meet its deadline, we can categorize the real-time databases as follows;

• Hard real-time database

• Soft real-time database

 

Hard real-time database

A real-time database with a hard deadline on its transaction is called as hard real-time database. Hard deadline transactions have few or all of the following characteristics;

• Timely and logically correct execution is considered to be critical.

• Missing hard deadline cannot be accepted, because, that lead to catastrophic consequences (serious implications on lives or big financial damage).

• Also called as safety critical deadlines

Hard Deadline

Example:

All safety critical systems are in this category – anti-missile system, patient monitoring system etc.

Soft real-time database

A real-time database with soft deadline transactions is called as soft real-time database. Soft deadline transactions have few or all of the following characteristics;

• Desirable but not critical deadlines

• Missing a deadline will not cause a failure or failure of system’s integrity.

• Result quality degrades after deadline, and may affect quality of service of the system.

Soft Deadline

Example:

Banking system, reservation systems, etc.

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