This field indicates whether this backend should be fully
utilized before sending traffic to backends with default
preference. The possible values are: - PREFERRED: Backends with
this preference level will be filled up to their capacity limits
first, based on RTT. - DEFAULT: If preferred backends don't have
enough capacity, backends in this layer would be used and
traffic would be assigned based on the load balancing algorithm
you use. This is the default
Values:
UNDEFINED_PREFERENCE (0):
A value indicating that the enum field is not
set.
DEFAULT (115302945):
No preference.
PREFERENCE_UNSPECIFIED (496219571):
If preference is unspecified, we set it to
the DEFAULT value
PREFERRED (418847841):
Traffic will be sent to this backend first.
