SAP HANA Architecture

Welcome to this foundation tutorial explaining the SAP HANA Architecture in detail. Here, we will understand the different components that make up the SAP HANA appliance.

SAP HANA Architecture in blocks

SAP HANA is not just a database – it’s an appliance which consists of different servers. Index server is the primary component but it consists of other different servers as well. Let’s understand what each of these servers are responsible for.

Index Server 

It is the prime server of SAP HANA that contains actual data and processing engines. This server processes the SQL and MDX statements when authentication and transactions are required.

Persistence Layer 

 This layer maintains atomicity and durability of transactions. It is accountable to make sure that the database is able to be restored to the recent state and transactions are properly executed or not left in the middle.

Preprocessor Server 

This server analyzes text data and extracts information with the help of Preprocessors.

Name Server 

This server maintains the detailed information about the system topology. It keeps the updates about all the components and their location.

Statistic Server 

This server maintains log of other servers and their details such as status, performance, allocation/consumption of resources, etc. This data is used to keep track of the clients and alert monitors.

Session and Transaction Manager 

This server monitors the database transactions and their execution. When a transaction is committed or rolled back, Transaction manager informs the storage engines to take necessary measures.

XS Engine 

This server facilitates communication between external applications and SAP HANA system via HTTP in a web browser.
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