Add TS.MGET example for OS Redis Cluster (#2507)

Author: uglide

docs/examples/timeseries_examples.ipynb

@@ -599,6 +599,47 @@
    "source": [
     "ts.range(\"ts_key_incr\", \"-\", \"+\")"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "source": [
+    "## How to execute multi-key commands on Open Source Redis Cluster"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "outputs": [
+    {
+     "data": {
+      "text/plain": "[{'ts_key1': [{}, 1670927124746, 2.0]}, {'ts_key2': [{}, 1670927124748, 10.0]}]"
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import redis\n",
+    "\n",
+    "r = redis.RedisCluster(host=\"localhost\", port=46379)\n",
+    "\n",
+    "# This command should be executed on all cluster nodes after creation and any re-sharding\n",
+    "# Please note that this command is internal and will be deprecated in the future\n",
+    "r.execute_command(\"timeseries.REFRESHCLUSTER\", target_nodes=\"primaries\")\n",
+    "\n",
+    "# Now multi-key commands can be executed\n",
+    "ts = r.ts()\n",
+    "ts.add(\"ts_key1\", \"*\", 2,  labels={\"label1\": 1, \"label2\": 2})\n",
+    "ts.add(\"ts_key2\", \"*\", 10,  labels={\"label1\": 1, \"label2\": 2})\n",
+    "ts.mget([\"label1=1\"])"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
   }
  ],
  "metadata": {