SAP S/4HANA Administration · High Availability

Your Rolling Kernel Switch on a busy production system is only half done after two days — why is dragging it out much longer a bad idea?

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More in High Availability

Your SAP HANA update normally needs the database shut down. How does running HANA in a high-availability setup with System Replication shrink that downtime to almost nothing?

What single objective drives every high-availability decision for SAP S/4HANA, and why is protecting the SAP software layer alone not enough?

The two timeout parameters of a Rolling Kernel Switch — what do their defaults control, and why must the start-wait value stay above rdisp/server_startup/max_time?

Once a Rolling Kernel Switch is running, how can you monitor its progress and where is it logged for later review?

How can you patch SAP HANA to a newer revision with almost no downtime by leaning on System Replication?

In the two-host AS ABAP + HANA HA setup, Host A dies — walk through how failover happens without losing the lock table.

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