InterSystems IRIS Data Platform 2019.2  /  Orientation Guide for Server-Side Programming  /  Namespaces and Databases

Orientation Guide for Server-Side Programming
Database Basics
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InterSystems: The power behind what matters   

Database Basics
An InterSystems IRIS database is an IRIS.DAT file. You create a database via the Management Portal. Or if you have an existing InterSystems IRIS database, you can configure InterSystems IRIS to become aware of it.
Database Configuration
For any database, InterSystems IRIS requires the following configuration details:
Additional options include the following:
In most cases, you can create, delete, or modify database attributes while the system is running.
Database Features
With each database, InterSystems IRIS provides physical integrity guarantees for both the actual data and the metadata that organizes it. This integrity is guaranteed even if an error occurs during writes to the database.
The databases are automatically extended as needed, without manual intervention. If you expect a particular database to grow and you can determine how large it will become, you can “pre-expand” it by setting its initial size to be near the expected eventual size. If you do so, the performance is better.
InterSystems IRIS provides a number of strategies that allow high availability and recoverability. These include:
InterSystems IRIS has a technology for distributing data and application logic and processing among multiple systems. It is called the Enterprise Cache Protocol (ECP). On a multiserver system, a network of InterSystems IRIS database servers can be configured as a common resource, sharing data storage and application processing, with the data distributed seamlessly among them. This provides increased scalability as well as automatic failover and recovery.
Database Portability
InterSystems IRIS databases are portable across platforms and across versions, with the following caveat:

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Content Date/Time: 2019-09-19 06:44:29