memoryMetrics       *cachevalue.Cache[madmin.MemInfo]
	cpuMetrics          *cachevalue.Cache[madmin.CPUMetrics]
	clusterDriveMetrics *cachevalue.Cache[storageMetrics]
	nodesUpDown         *cachevalue.Cache[nodesOnline]
}

func newMetricsCache() *metricsCache {
	return &metricsCache{
		dataUsageInfo:       newDataUsageInfoCache(),
		esetHealthResult:    newESetHealthResultCache(),
		driveMetrics:        newDriveMetricsCache(),

package cmd

import (
	"context"
	"errors"
	"strings"
	"time"

	jsoniter "github.com/json-iterator/go"
	"github.com/minio/minio/internal/cachevalue"
)

const (
	dataUsageRoot   = SlashSeparator
	dataUsageBucket = minioMetaBucket + SlashSeparator + bucketMetaPrefix

	dataUsageObjName       = ".usage.json"

    Object cachedKey = new Object();
    Object cachedValue = new Object();
    Cache<Object, Object> cache =
        new AbstractCache<Object, Object>() {
          @Override
          public @Nullable Object getIfPresent(Object key) {
            return cachedKey.equals(key) ? cachedValue : null;
          }
        };

    assertEquals(
        ImmutableMap.of(cachedKey, cachedValue),

func NewBucketQuotaSys() *BucketQuotaSys {
	return &BucketQuotaSys{}
}

var bucketStorageCache = cachevalue.New[DataUsageInfo]()

// Init initialize bucket quota.
func (sys *BucketQuotaSys) Init(objAPI ObjectLayer) {
	bucketStorageCache.InitOnce(10*time.Second,
		cachevalue.Opts{ReturnLastGood: true, NoWait: true},
		func(ctx context.Context) (DataUsageInfo, error) {
			if objAPI == nil {