SAP Instance Concept
* An SAP Instance is the basic building block of an SAP system & can comprise of one or more SAP instances
* An SAP system comprises of 2 parts : Application Instance & Database Instance
* When the application & database instance reside on the same hardware , it is then known as a “SINGLE INSTANCE”
* When the application & database instance do not share the same hardware resources , then the instance is known as a “DISTRIBUTED INSTANCE”
* An SAP Instance is uniquely identified with a system ID , known as SID and an instance number
An SAP Application Instance can be broken down to the following types :
Note:
Each SAP system can have only 1 Central Instance , 1 Central Services Instance and only 1 Database instance. It can have any number of additional dialog instances
SAP Instances Distribution in a SAP system
Note :
** Each Box represents a physical machine or a partition within the same hardware
** The Database Instance ID , also called DBSID is normally the same as the SAP instance ID , or SID.The SID is always 3 characters long and can contain alphanumerals , but it must start with an alphabet. The Instance Number is always a 2 digit number , and can be any combination of digits between 0 & 9.
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This is too good. but i want this in details with example.