Data compression sap hana

  • What is data compression in SAP HANA?

    Compression is calculated using Compression factor.
    Compression factor refers to the ratio of the uncompressed data size to the compressed data size in SAP HANA.
    In SAP HANA, Compression is performed and calculations are done as part of the delta merge operation.Mar 6, 2020.

  • What is optimized compression in Hana?

    Since HANA does perform compression optimisation - that is, it tries to find the best compression algorithm for every column in a table, given all other columns - this might have changed after the re-partitioning..

  • What kind of compression exist in SAP HANA environments?

    SAP HANA, the in-memory database platform, provides its own data compression techniques tailored for SAP environments.
    It offers various compression algorithms optimized for different data types, such as dictionary compression, run-length encoding, and delta encoding..

  • SAP HANA (High-performance ANalytic Appliance) is a multi-model database that stores data in its memory instead of keeping it on a disk.
    The column-oriented in-memory database design allows you to run advanced analytics alongside high-speed transactions – in a single system.
  • The SAP HANA database supports two types of table: those that store data either column-wise ( column tables ) or row-wise ( row tables ).
    SAP HANA is optimized for column storage and this is the default table type.
Compression is calculated using Compression factor. Compression factor refers to the ratio of the uncompressed data size to the compressed data size in SAP HANA. In SAP HANA, Compression is performed and calculations are done as part of the delta merge operation.
Each column can be further compressed using different compression methods, namely prefix encoding, run length encoding (RLE), cluster encoding, sparse encoding, and indirect encoding. The SAP HANA database uses compression algorithms to determine which type of compression is most appropriate for a column.
The compressed data volume in SAP HANA is the total size that the table occupies in the main memory of SAP HANA. Example. You can retrieve this information for 

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