## Changelog since v1.28.10

## Changes by Kind

### API Change

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  

		if name == "" {
			continue
		}

		fileName = part.FileName()

		// Multiple values for the same key (one map entry, longer slice) are cheaper
		// than the same number of values for different keys (many map entries), but
		// using a consistent per-value cost for overhead is simpler.
		maxMemoryBytes := 2 * int64(10<<20)
		maxMemoryBytes -= int64(len(name))
		maxMemoryBytes -= mapEntryOverhead

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  

* Fixed API server panic during concurrent GET or LIST requests with non-empty `resourceVersion`. ([#65092](https://github.com/kubernetes/kubernetes/pull/65092), [@sttts](https://github.com/sttts))
* Properly manage security groups for loadbalancer services on OpenStack. ([#65373](https://github.com/kubernetes/kubernetes/pull/65373), [@multi-io](https://github.com/multi-io))

- Updated the control plane's trust anchor publisher to create and manage a new ClusterTrustBundle object, associated with the `kubernetes.io/kube-apiserver-serving` X.509 certificate signer. This ClusterTrustBundle contains a PEM bundle in its payload that you can use to verify kube-apiserver serving certificates. ([#...

     * purposes, the "count" field, tracking the number of elements, serves as that volatile
     * variable ensuring visibility. This is convenient because this field needs to be read in many
     * read operations anyway:
     *
     * - All (unsynchronized) read operations must first read the "count" field, and should not
     * look at table entries if it is 0.
     *

		}

		for _, maxKeys := range []int{1, 10, 49} {
			// Test ListObjects V2
			totalObjs, didRuns := 0, 0
			marker := ""
			for {
				didRuns++
				if didRuns > 1000 {
					t.Fatal("too many runs")
					return
				}
				result, err := obj.ListObjectsV2(context.Background(), upload.bucket, "", marker, "", maxKeys, false, "")
				if err != nil {

* Improve efficiency of preemption logic in clusters with many pending pods. ([#72895](https://github.com/kubernetes/kubernetes/pull/72895), [@bsalamat](https://github.com/bsalamat))

### Server-side Apply graduates to GA

	// parent directories shouldn't trickle down.
	s.deleteFile(basePath, pathutil.Dir(pathutil.Clean(deletePath)), false, false)

	return nil
}

// DeleteBulk - delete many files in bulk to trash.
// this delete does not recursively delete empty
// parents, if you need empty parent delete support
// please use Delete() instead. This API is meant as
// an optimization for Multipart operations.