A new series of enhancements for handling locality load balancing in proxyless mesh deployments is now available in GA
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## Feature
A new series of enhancements for handling locality load balancing in proxyless mesh deployments is now available in GA. These enhancements let you do the following:
* Create and use a list of preferred load-balancing policies. With this feature, if your first preferred policy can't be used by a particular client, gRPC falls back to the next policy on the list.
* Use a custom load-balancing policy that you created and deployed with gRPC. As part of a related gRPC enhancement, a new set of APIs lets you capture metrics about query cost and server utilization. You can use these APIs to fine-tune your custom policy.
For more information about using these features, see [Locality load balancing](https://cloud.google.com/traffic-director/docs/proxyless-configure-advanced-traffic-management#custom-lb-config).
**Caution:** This feature is intended for use in a service mesh that includes gRPC clients only. Envoy proxies can't use backend services that have this configuration.