Data compression in sap bi

  • How does compression affect data?

    Compressed files require significantly less storage capacity than uncompressed files, meaning a significant decrease in expenses for storage.
    A compressed file also requires less time for transfer while consuming less network bandwidth.
    This can also help with costs, and also increases productivity..

  • What are the different types of compression in Hana?

    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..

  • What is SAP data compression?

    The compression factor refers to the ratio of the uncompressed data size to the compressed data size in SAP HANA.
    The uncompressed data volume is a database-independent value that is defined as follows: the nominal record size multiplied by the number of records in the table..

  • What is the use of compression in SAP BW?

    You can use InfoCube compression to reduce the data volume within an InfoCube.
    During the InfoCube compression, rows with duplicated keys are summarized in the E fact table, and the corresponding data packages are deleted from the F fact table..

  • Compressed files require significantly less storage capacity than uncompressed files, meaning a significant decrease in expenses for storage.
    A compressed file also requires less time for transfer while consuming less network bandwidth.
    This can also help with costs, and also increases productivity.
  • Compression is a method in order to compress the data in the fact table.
    When the user performs compression all the request IDs are deleted and the data transferred into the E table.
    There can be some data with same characteristic combination and with different Request IDs, these data records can be compressed.
Oct 10, 2013Compressing a fact table is done in the InfoCube administration and is based on the request id number. Doing a compression can have an impact on 
Oct 26, 2007The purpose of the compression process is to delete the Request IDs. The same data record can have multiple occurrences in the same cube due to  Does compressing and Infocube affect the way we perform reporting what is difference betwwen aggregates and compression in bi 7.0.COMPRESSION - SAP CommunityData archiving process & compression | SAP CommunityMore results from answers.sap.com
Oct 26, 2007The purpose of the compression process is to delete the Request IDs. The same data record can have multiple occurrences in the same cube due to  what is difference betwwen aggregates and compression in bi 7.0.COMPRESSION - SAP CommunityREG: Aggregates, compression, roll up and partition - SAP Answerscompression,aggregation,Loading, performance and BIMore results from answers.sap.com

How to change index compression type in SAP ABAP report?

However, you can choose the index compression type manually by checking the according checkbox:

  1. Use SAP transaction SA38 or SE38 to start the ABAP report MSSCOMPRESS

To get a brief description of MSSCOMPRESS, press the “i” button or choose “Application Help” from the “Help” menu.
In the following, MSSCOMPRESS is described in detail.
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How to compress data & indexes using SAP note 1459005?

Once you have applied SAP note 1459005, you can compress data and (non-clustered) indexes using the report MSSCOMPRESS.
The default compression type for report MSSCOMPRESS is taken from the default compression type of the SAP data dictionary.
The index compression type is in sync with the data compression type.

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What is a data compression type?

The data compression type can be “ROW”, “PAGE” or “none”.
For a partitioned table you may see a combined compression type, for example “ROW, PAGE”.
This is the case, if some partitions are row compressed and some partitions of the same table are page compressed.
The same applies for the index compression type.

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What is compression factor in SAP HANA?

For more information, see the section on merge motivations.
The compression factor refers to the ratio of the uncompressed data size to the compressed data size in SAP HANA.
The uncompressed data volume is a database-independent value that is defined as follows:

  1. the nominal record size multiplied by the number of records in the table

How to calculate a compression value in SAP HANA?

For applying any type of compression on a data table, we must calculate a compression value first using appropriate factors

Thus, the compression value is calculated using a compression factor

The compression factor is the ratio of the size of uncompressed data to the size of compressed data in SAP HANA

Technology is evolving rapidly!

What is dictionary compression in HANA database?

Dictionary Compression Dictionary compression is a standard compression method to reduce data volume in the main memory

It is a default compression method which compulsorily applies on all columns of a data table in HANA database

In this technique, we map distinct column values to consecutive numbers (value ID)


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