for background information.

### Scheduling

  - Opaque Integer Resources (OIRs) are deprecated and will be removed in
    version 1.9. Extended Resources (ERs) are a drop-in replacement for OIRs. You can use
    any domain name prefix outside of the `kubernetes.io/` domain instead of the
    `pod.alpha.kubernetes.io/opaque-int-resource-` prefix.

## Notable Features

### Workloads API (apps/v1beta2)

- DRA: Restricted the length of opaque device configuration parameters. At admission time, Kubernetes enforces a 10KiB size limit. ([#128601](https://github.com/kubernetes/kubernetes/pull/128601), [@pohly](https://github.com/pohly)) [SIG API Machinery, Apps, Auth, Etcd, Node, Scheduling...

*   Opaque integer resources (OIR), which were (deprecated in v1.8.), have been removed. ([#55103](https://github.com/kubernetes/kubernetes/pull/55103),[ @ConnorDoyle](https://github.com/ConnorDoyle))

### **Storage**

- Added alpha field storageVersionHash to the discovery document for each resource. Its value must be treated as opaque by clients. Only equality comparison on the value is valid. ([#73191](https://github.com/kubernetes/kubernetes/pull/73191), [@caesarxuchao](https://github.com/caesarxuchao))

- The `storageVersionHash` feature is now beta. `StorageVersionHash` is a field in the discovery document of each resource. It enables clients to detect whether the storage version of that resource has changed. Its value must be treated as opaque by clients. Only equality comparison on the value is valid. ([#78325](https://github.com/kubernetes/kubernetes/pull/78325), [@caesarxuchao](https://github.com/caesarxuchao))