What is a multi instance server?

Why do we need multiple instances?

We need to provide extra securty layer between databases. 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 single instance and multiple instance?

Therefore, a single-instance ERP solution is one that uses the ERP system for all your business operations—on either the front end or the back end. Multiple-instance ERP solutions are commonly used by businesses that operate globally to accommodate each country's needs or financial systems.

What is an instance server?

An instance is a single copy of the software running on a single physical or virtual server. If you run two copies of the software on the same physical or virtual server, that counts as two instances.

What is the difference between a server and an instance?

A server is a (physical or virtual) machine hosting SQL Server software. An instance is a collection of SQL Server databases run by a single SQL Server service, ahem, instance. You can view each separate instance you're running in your service console.