NetApp
7-mode/HA pair/V-Series : Active/active configuration : Understanding active/active configuration : Active/active configuration
Active/active configuration
System Manager includes several features that enable you to keep operating a storage system even if its partner system in an active/active configuration stops functioning. Takeover is the process in which a node takes over the storage of its partner. Giveback is the process in which the storage is returned to the partner.
When one storage system in an active/active configuration undergoes a system failure and cannot reboot, the partner system in the active/active configuration can take over the failed system's functions and serve network clients the data on the failed system's disks. This is known as a takeover. Additionally, you can issue a manual takeover at any time, to force a takeover: for instance, to allow scheduled maintenance to be performed on a storage system.
After the failed partner is running normally again, you issue a giveback, which returns the identity from the emulated storage system to the failed system, resulting in a return to normal operation.