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In the SAP HANA cockpit, from the SYSTEMDB Manage Services app, you can stop the following services:

Web dispatcher: Manages HTTP traffic to SAP HANA, and stopping this service affects access via web-based applications.

Compile server: Supports the compilation of SQLScript functions and stored procedures, and can be managed directly from the SYSTEMDB.

References=Details on managing SAP HANA services through the SAP HANA cockpit are provided in SAP HANA administration guides and official documentation.

Database Administration

In SAP HANA Cloud, native storage extension utilizes dynamic tiering. This approach integrates dynamic tiering by extending in-memory tables with disk-based storage, allowing data to be managed across different storage tiers. Dynamic tiering is particularly effective for managing large volumes of data where not all data needs to reside in memory, thus balancing performance with cost efficiency.References= SAP HANA Cloud documentation on storage and data management, which explains the functionality and benefits of using dynamic tiering within the database system.

SAP HANA Architecture

Provisioning SAP HANA

The default activated data stores when provisioning an SAP HANA Cloud, SAP HANA database are:

In-memory: The primary storage technology used by SAP HANA, where data is stored in RAM for high-speed access.

Native storage extension: Provides the ability to manage large data volumes in a cost-efficient manner while keeping frequently accessed data in-memory.

References=SAP HANA Cloud documentation and provisioning guides typically include information on the storage

The prerequisites that must be fulfilled when recovering a tenant database include:

The tenant database must be stopped before the recovery starts: Ensuring the database is not running is crucial to avoid conflicts and data corruption during the recovery process.

The logon credentials of the system database user must be available: This is necessary because recovery operations often require administrative privileges, and the system database user typically has the required level of access.

References=SAP HANA recovery procedures and prerequisites are thoroughly detailed in the SAP HANA administration guide, which stipulates the necessary conditions and user permissions for successful database recovery operations.

The purpose of the statement library in the SAP HANA database explorer includes executing scripts from the SQL statement collection specifically curated for SAP HANA and sharing custom SQL scripts with the administration team. This allows administrators and developers to execute predefined, optimized SQL scripts that enhance performance and ensure best practices. Additionally, the feature to share custom scripts fosters collaborationand efficiency among the team by making frequently used or complex scripts readily available to all members.References= SAP HANA Database Explorer documentation on SQL scripts management.

Monitoring and Troubleshooting

For a tailored data center integration (TDI) installation of a productive SAP HANA database system, it is essential to size the following hardware KPIs:A. DRAM required for the static data memory area, as it determines the amount of main memory needed to hold the active dataset of the SAP HANA database in memory for fast processing.B. Total disk space required for the log volume, which is crucial for maintaining the log entries that record all transactions and database changes, necessary for recovery and durability.Persistent memory (PMEM) for backups and network bandwidth for the storage zone, while important in their own right, are not directly related to initial sizing criteria for DRAM and disk space as per SAP HANA TDI guidelines.References= SAP HANA Tailored Datacenter Integration (TDI) guide which includes details on sizing and planning infrastructure for deploying SAP HANA.

SAP HANA Architecture

The SAP HANA Hardware and Cloud Measurement Tool (HCMT) is designed to check and measure the performance aspects related to the physical and virtualized resources allocated to SAP HANA. With this tool, you can check CPU states, which involves analyzing the CPU's performance, utilization, and potential bottlenecks. Additionally, the tool allows for a NUMA (Non-Uniform Memory Access) memory bandwidth test, which is crucial for ensuring that memory access patterns are optimized for performance in systems where memory is segmented across different physical machines or nodes.References= SAP HANA administration guides and HCMT documentation.

Monitoring and Troubleshooting

By default, SAP HANA Cloud, SAP HANA database backups are retained for two weeks. This standard retention period is designed to balance storage utilization with adequate recovery options, ensuring that backups are available for a sufficient duration to address potential data recovery needs while managing storage costs effectively.

References=The default backup retention policy for SAP HANA Cloud is specified in the SAP HANA Cloud administration guide, which outlines the management and configuration of database backups.

Backup and Recovery

To ensure that a consistent database status is saved using data snapshots, the appropriate action is to:

Trigger a savepoint: This operation synchronizes the database's in-memory state with persistent storage, ensuring that the snapshot reflects a consistent state of the database.

References=SAP HANA documentation on backup and recovery methods emphasizes the importance of savepoints in creating consistent and reliable data snapshots.

The options for Audited Action Status available in SAP HANA Cloud are:B. Enabled, which indicates that auditing is turned on for the specific action.D. Unsuccessful, which specifically tracks actions that failed due to errors or lack of permissions, helping in pinpointing potential security issues or misconfigurations.Tracking both enabled actions and unsuccessful attempts are crucial for detailed audit trails that support security audits and compliance checks.References= SAP HANA Security documentation detailing audit configuration and audit log management.

Database Security