What are the key components of SAP HANA's High Availability Per Datacenter feature?

The key components of SAP HANA's High Availability Per Datacenter feature include a high availability configuration, which is fundamental to ensuring that the system can withstand failures of individual components without disrupting service. This configuration allows for the setup of backup systems that can take over in case the primary system fails, thereby maintaining continuous operation and minimizing downtime.

In a high availability scenario, instances are set up across different nodes, and they work together to provide reliable access to data and services. The focus on high availability configurations ensures that data redundancy and real-time data replication are implemented, supporting business continuity seamlessly.

While other options may touch on relevant aspects of high availability within an SAP HANA environment, they do not capture the complete essence of the high availability configuration itself. For instance, shared file systems and active clusters pertain to certain configurations and setups but do not encapsulate the broader concept of a high availability architecture that aims at system resilience. The fourth option, mentioning services running on all nodes, while crucial, does not emphasize the configurational aspect that is central to ensuring high availability.