MP_SetOverridePath - manually override a logical unit path
cc [ flag… ] file… –lMPAPI [ library… ] #include <mpapi.h> MP_STATUS MP_SetOverridePath(MP_OID logicalUnitOid, MP_OID pathOid);
The object ID of the multipath logical unit.
The object ID of the path logical unit.
The MP_SetOverridePath() function is used to manually override the path for a logical unit. The path is exclusively used to access the logical unit until cleared. Use MP_CancelOverride to clear the override.
This API allows the administrator to disable the dri ver's load balance algorithm and force all I/O operations to a specific path. The existing path weight configuration is maintained. If the administrator undoes the override (by calling MP_CancelOverridePath), the driver starts load balancing based on the weights of available paths (and target port group access state for asymmetric devices).
If the multipath logical unit is part of a target with asymmetrical access, executing this command could cause failover.
The logicalUnitOid or pathOid does not specify any valid object type. This is most likely to happen if an uninitialized object ID is passed to the API.
The logicalUnitOid has a type subfield other than MP_OBJECT_TYPE_MULTIPATH_LU, or if pathOid has an object type other than MP_OBJECT_TYPE_PATH_LU.
The logicalUnitOid, pathOid owner ID, or object sequence number is invalid.
The operation is successful.
The implementation does not support the API.
The driver cannot communicate through selected path
See attributes(7) for descriptions of the following attributes:
Multipath Management API Version 1.0