diff --git a/_Sidebar.md b/_Sidebar.md
index 102a06f..2e07eac 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -25,8 +25,11 @@
     * [[restic with SeaweedFS]]
   * [[Migrate to Filer Store]]
   * [[Add New Filer Store|Customize Filer Store]]
-  * [[Hadoop Compatible File System]]
   * [[WebDAV]]
+  * HDFS
+    * [[Hadoop Compatible File System]]
+    * [[run Spark on SeaweedFS]]
+    * [[run HBase on SeaweedFS]]
 * Async Replication
   * [[Async Replication to another Filer]]
   * [[Backup to Cloud]]