Allow caching based on a configurable number of hits. (#8891)

Co-authored-by: Harshavardhana <harsha@minio.io>

cmd/disk-cache-utils.go

@@ -265,3 +265,21 @@ func decryptCacheObjectETag(info *ObjectInfo) error {
 
 	return nil
 }
+
+func isMetadataSame(m1, m2 map[string]string) bool {
+	if m1 == nil && m2 == nil {
+		return true
+	}
+	if (m1 == nil && m2 != nil) || (m2 == nil && m1 != nil) {
+		return false
+	}
+	if len(m1) != len(m2) {
+		return false
+	}
+	for k1, v1 := range m1 {
+		if v2, ok := m2[k1]; !ok || (v1 != v2) {
+			return false
+		}
+	}
+	return true
+}