
Redundant Host API
Hence, forced switchover is potentially destructive for the owning host and should be used with care.
To perform forced switchover, it is sufficient to call the RhPerformSwitchover function. Forced switchover can be initiated either by the owning host (in which case it voluntarily gives up control of this domain), or by the new owner of the domain, or by some
After the switchover, software connection is automatically initiated for the relevant domains on the receiving hosts.
6.2.5.1.4Hostile Switchover
Even in the case of a forced switchover request, there may be a possibility for the owning host to intercept the hardware switchover request and prevent it via hostile actions with respect to the destination host (for example, powering it off). An additional parameter (“Hostile”) to the RhPerformSwitchover function can be used to perform unconditional (hostile) switchover without any possibility for the owning host to prevent it.
After the switchover, software connection is automatically initiated for the relevant domains on the receiving hosts.
6.2.5.1.5Hardware-Initiated Switchover
This type of switchover is initiated by hardware in the case of a
The RhSetHwDestinationHost function can be called either on the owning host or on some third- party host. In the last case, an
During
After the switchover, software connection is automatically initiated for the relevant domains on the receiving hosts.
6.2.5.2RhPrepareForSwitchover
Prototype:
HSI_STATUS
RhPrepareForSwitchover(
IN RH_HANDLE Handle,
IN uint32 *pDomains,
IN uint32 DomainCount,
High Availability Software for the Intel® NetStructureTM ZT 4901 Technical Product Specification | 63 |