Specifies how to determine whether the backend of a load
balancer can handle additional traffic or is fully loaded. For
usage guidelines, see Connection balancing mode. Backends must
use compatible balancing modes. For more information, see
Supported balancing modes and target capacity settings and
Restrictions and guidance for instance groups. Note: Currently,
if you use the API to configure incompatible balancing modes,
the configuration might be accepted even though it has no impact
and is ignored. Specifically, Backend.maxUtilization is ignored
when Backend.balancingMode is RATE. In the future, this
incompatible combination will be rejected.
Values:
UNDEFINED_BALANCING_MODE (0):
A value indicating that the enum field is not
set.
CONNECTION (246311646):
Balance based on the number of simultaneous
connections.
RATE (2508000):
Balance based on requests per second (RPS).
UTILIZATION (157008386):
Balance based on the backend utilization.
