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SAP HANA Administration - Part 1
Course Overview
1. Introduction
2. SAP HANA Installation Overview
3. SAP HANA Sizing
4. Pre-Installation Steps for SAP HANA
5. Installation of SAP HANA with SAP HANA Lifecycle Management Tools
6. What is Next?
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3.6 Disk Sizing

SAP HANA is an in-memory database. But it still requires disk storage space — to preserve database information if the system shuts down, either intentionally or due to a power loss, for instance.

Disk sizing can be categorized into

Persistence Layer (Data Volume):
Data changes in the database are periodically copied to disk to ensure a full image of the business data on disk in Data Volume (Persistence Layer).

The capacity for this storage is calculated based on the total amount of RAM:

SAP HANA Administration Course

Disk Log (Log Volume):
Log Volume saves log files to ensure that changes are durable and the database can be restored to the last committed state after a restart.
The minimum size for the Log Volume is equal to the size of the SAP HANA server‘s main memory.

SAP HANA Administration Course

Note that the certified hardware configurations already take these rules into account, so there is no need to perform this disk sizing. However, we still include it here for your understanding.
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