Revert "fix: remove persistence layer for metacache store in memory (#11538)"

This reverts commit b23659927c.

cmd/metacache.go

@@ -17,9 +17,14 @@
 package cmd
 
 import (
+	"context"
+	"errors"
+	"fmt"
 	"path"
 	"strings"
 	"time"
+
+	"github.com/minio/minio/cmd/logger"
 )
 
 type scanStatus uint8
@@ -226,3 +231,21 @@ func (m *metacache) update(update metacache) {
 	}
 	m.fileNotFound = m.fileNotFound || update.fileNotFound
 }
+
+// delete all cache data on disks.
+func (m *metacache) delete(ctx context.Context) {
+	if m.bucket == "" || m.id == "" {
+		logger.LogIf(ctx, fmt.Errorf("metacache.delete: bucket (%s) or id (%s) empty", m.bucket, m.id))
+	}
+	objAPI := newObjectLayerFn()
+	if objAPI == nil {
+		logger.LogIf(ctx, errors.New("metacache.delete: no object layer"))
+		return
+	}
+	ez, ok := objAPI.(*erasureServerPools)
+	if !ok {
+		logger.LogIf(ctx, errors.New("metacache.delete: expected objAPI to be *erasureServerPools"))
+		return
+	}
+	ez.deleteAll(ctx, minioMetaBucket, metacachePrefixForID(m.bucket, m.id))
+}