Allocate Storage to a Space

Use the Space Storage properties to allocate disk and memory storage to the space and to choose whether it will have access to the SAP HANA data lake.

Prerequisites

To allocate disk and memory storage to spaces, you must have a global role that grants you the following privileges:

  • Data Warehouse General (-R------) - To access SAP Datasphere.

  • Spaces (-------M) - To update all spaces and space properties.

  • Space Files (-------M) - To view objects and data in all spaces.

The DW Administrator global role, for example, grants these privileges. For more information, see Privileges and Permissions and Standard Roles Delivered with SAP Datasphere.

Context

SAP Datasphere supports data tiering using the features of SAP HANA Cloud:

  • Memory Storage (hot data) - Keep your most recent, frequently-accessed, and mission-critical data loaded constantly in memory to maximize real-time processing and analytics speeds.

    When you persist a view, the persisted data is stored in memory (see Persist Data in a Graphical or SQL View).

  • Disk (warm data) - Store master data and less recent transactional data on disk to reduce storage costs.

    When you load data to a local table or replicate data to a remote table in SAP Datasphere, the data is stored on disk by default, but you can load it in memory by activating the Store Table Data in Memory switch (see Accelerate Table Data Access with In-Memory Storage).

  • Data Lake (cold data) - Store historical data that is infrequently accessed in the data lake. With its low cost and high scalability, the data lake is also suitable for storing vast quantities of raw structured and unstructured data, including IoT data. For more information, see Integrating Data to and From SAP HANA Cloud Data Lake.

You can allocate specific amounts of memory and disk storage to a space or disable the Enable Space Quota option, and allow the space to consume all the storage it needs, up to the total amount available in your tenant.

Procedure

  1. In the side navigation area, select (Space Management), locate your space tile, and select Edit to open it.
  2. Use the Space Storage properties to allocate disk and memory storage to the space and to choose whether it will have access to the SAP HANA data lake.

    Property

    Description

    Enable Space Quota

    Disable this option to allow the space to consume any amount of disk and memory storage up to the total amounts available in your tenant.

    If this option was disabled and then subsequently re-enabled, the Disk and Memory properties are initialized to the minimum values required by the current contents of the space.

    Default: Enabled

    Disk (GB)

    Enter the amount of disk storage allocated in GB. You can use the buttons to change the amount by whole GBs or enter fractional values in increments of 100 MB by hand.

    Default: 2 GB

    Memory (GB)

    Enter the amount of memory storage allocated in GB. This value cannot exceed the amount of disk storage allocated. You can use the buttons to change the amount by whole GBs or enter fractional values in increments of 100 MB by hand.

    Default: 1 GB

    Use This Space to Access the Data Lake

    Enable access to the SAP HANA Cloud data lake. Only one space can connect to the data lake.

    Default: Disabled
  3. Click Save to save your changes to the space, or Deploy to save and immediately make the changes available to users assigned to the space.

Results

To view the total storage available and the amount assigned to and used by all spaces, see Monitoring System and Spaces.