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  • 1.  Index server in SAP HANA Architecture

    Posted Sat April 13, 2019 04:49 AM
    Can anyone explain the functioning of Index server in SAP HANA Architecture?

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    Rinu Gour
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  • 2.  RE: Index server in SAP HANA Architecture

    Posted Sat April 13, 2019 05:12 AM
    Index Server is the main component of SAP HANA Architecture. It consists of engines and actual data for data processing. The Index Server takes care of all the requests and processes them. Complete processing of SAP HANA is done in Index Server. It processes incoming SQL or MDX statements which comes to the SAP HANA database system.

    The components of the Index Server are:

    1. Connection and Session Manager

    It manages all database transactions and tracks all the transactions. Whenever a transaction completes or fails, the transaction manager informs suitable data engine to perform relevant actions.

    2. Persistence Layer

    The Persistence Layer utilizes the existing feature of Disaster Recovery for SAP HANA Database. It also manages data and transaction logs and consist of log backup and data backup of SAP HANA system.

    3. Planning Engine

    The planning engine creates SQL processing plans.

    It generates a plan particular to each request sent to the HANA database. It handles the different levels of aggregations which are applied to data.

    4. Calc Engine

    It modifies data into calculation models for creating logical execution plan to handle parallel processing of statements.

    5. Repository

    It continues the versioning of SAP HANA metadata object like stored procedure.

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    Animesh Agrawal
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