What is multiple database instances?

What is multiple instance database?

Multiples instances give us the ability to spread load over more than one TempDB. Databases are stored in separate SQL intances which are more secured and very well protected from one another. They don't interfere with each other.

What is a database instance?

A database instance is a set of memory structures that manage database files. A database is a set of physical files on disk created by the CREATE DATABASE statement. The instance manages its associated data and serves the users of the database.

Can one database have multiple instances?

It appears as though you cannot have multiple databases running under one instance. Without OPS or RAC, you must have one instance for each database if you want to access data in that database. However, it is possible to access another database's data through an instance by using Database Links.

How do you create multiple instances of database?

Creating a Database for a Multi-instance Environment.1Start Server Manager.2Connect with SYSDBA privileges.3Start up an instance with the NOMOUNT option.4Issue the CREATE DATABASE statement.5Create additional rollback segments and threads, as needed.6Close and dismount the database.14 Creating a Database & Objects for Multiple Instances