diff --git a/metadata/Admin/V2/Instance.php b/metadata/Admin/V2/Instance.php
index 51e9f0c..7cfcef6 100644
Binary files a/metadata/Admin/V2/Instance.php and b/metadata/Admin/V2/Instance.php differ
diff --git a/src/Admin/V2/Cluster.php b/src/Admin/V2/Cluster.php
index 4039b9c..f85b6bc 100644
--- a/src/Admin/V2/Cluster.php
+++ b/src/Admin/V2/Cluster.php
@@ -46,6 +46,12 @@ class Cluster extends \Google\Protobuf\Internal\Message
      * Generated from protobuf field <code>int32 serve_nodes = 4;</code>
      */
     protected $serve_nodes = 0;
+    /**
+     * Immutable. The node scaling factor of this cluster.
+     *
+     * Generated from protobuf field <code>.google.bigtable.admin.v2.Cluster.NodeScalingFactor node_scaling_factor = 9 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     */
+    protected $node_scaling_factor = 0;
     /**
      * Immutable. The type of storage used by this cluster to serve its
      * parent instance's tables, unless explicitly overridden.
@@ -80,6 +86,8 @@ class Cluster extends \Google\Protobuf\Internal\Message
      *     @type int $serve_nodes
      *           The number of nodes allocated to this cluster. More nodes enable higher
      *           throughput and more consistent performance.
+     *     @type int $node_scaling_factor
+     *           Immutable. The node scaling factor of this cluster.
      *     @type \Google\Cloud\Bigtable\Admin\V2\Cluster\ClusterConfig $cluster_config
      *           Configuration for this cluster.
      *     @type int $default_storage_type
@@ -208,6 +216,32 @@ public function setServeNodes($var)
         return $this;
     }
 
+    /**
+     * Immutable. The node scaling factor of this cluster.
+     *
+     * Generated from protobuf field <code>.google.bigtable.admin.v2.Cluster.NodeScalingFactor node_scaling_factor = 9 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     * @return int
+     */
+    public function getNodeScalingFactor()
+    {
+        return $this->node_scaling_factor;
+    }
+
+    /**
+     * Immutable. The node scaling factor of this cluster.
+     *
+     * Generated from protobuf field <code>.google.bigtable.admin.v2.Cluster.NodeScalingFactor node_scaling_factor = 9 [(.google.api.field_behavior) = IMMUTABLE];</code>
+     * @param int $var
+     * @return $this
+     */
+    public function setNodeScalingFactor($var)
+    {
+        GPBUtil::checkEnum($var, \Google\Cloud\Bigtable\Admin\V2\Cluster\NodeScalingFactor::class);
+        $this->node_scaling_factor = $var;
+
+        return $this;
+    }
+
     /**
      * Configuration for this cluster.
      *
diff --git a/src/Admin/V2/Cluster/NodeScalingFactor.php b/src/Admin/V2/Cluster/NodeScalingFactor.php
new file mode 100644
index 0000000..c5f625f
--- /dev/null
+++ b/src/Admin/V2/Cluster/NodeScalingFactor.php
@@ -0,0 +1,67 @@
+<?php
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/bigtable/admin/v2/instance.proto
+
+namespace Google\Cloud\Bigtable\Admin\V2\Cluster;
+
+use UnexpectedValueException;
+
+/**
+ * Possible node scaling factors of the clusters. Node scaling delivers better
+ * latency and more throughput by removing node boundaries.
+ *
+ * Protobuf type <code>google.bigtable.admin.v2.Cluster.NodeScalingFactor</code>
+ */
+class NodeScalingFactor
+{
+    /**
+     * No node scaling specified. Defaults to NODE_SCALING_FACTOR_1X.
+     *
+     * Generated from protobuf enum <code>NODE_SCALING_FACTOR_UNSPECIFIED = 0;</code>
+     */
+    const NODE_SCALING_FACTOR_UNSPECIFIED = 0;
+    /**
+     * The cluster is running with a scaling factor of 1.
+     *
+     * Generated from protobuf enum <code>NODE_SCALING_FACTOR_1X = 1;</code>
+     */
+    const NODE_SCALING_FACTOR_1X = 1;
+    /**
+     * The cluster is running with a scaling factor of 2.
+     * All node count values must be in increments of 2 with this scaling factor
+     * enabled, otherwise an INVALID_ARGUMENT error will be returned.
+     *
+     * Generated from protobuf enum <code>NODE_SCALING_FACTOR_2X = 2;</code>
+     */
+    const NODE_SCALING_FACTOR_2X = 2;
+
+    private static $valueToName = [
+        self::NODE_SCALING_FACTOR_UNSPECIFIED => 'NODE_SCALING_FACTOR_UNSPECIFIED',
+        self::NODE_SCALING_FACTOR_1X => 'NODE_SCALING_FACTOR_1X',
+        self::NODE_SCALING_FACTOR_2X => 'NODE_SCALING_FACTOR_2X',
+    ];
+
+    public static function name($value)
+    {
+        if (!isset(self::$valueToName[$value])) {
+            throw new UnexpectedValueException(sprintf(
+                    'Enum %s has no name defined for value %s', __CLASS__, $value));
+        }
+        return self::$valueToName[$value];
+    }
+
+
+    public static function value($name)
+    {
+        $const = __CLASS__ . '::' . strtoupper($name);
+        if (!defined($const)) {
+            throw new UnexpectedValueException(sprintf(
+                    'Enum %s has no value defined for name %s', __CLASS__, $name));
+        }
+        return constant($const);
+    }
+}
+
+// Adding a class alias for backwards compatibility with the previous class name.
+class_alias(NodeScalingFactor::class, \Google\Cloud\Bigtable\Admin\V2\Cluster_NodeScalingFactor::class);
+