diff --git a/Distributed-Filer.md b/Distributed-Filer.md
index 9af5c98..98736f3 100644
--- a/Distributed-Filer.md
+++ b/Distributed-Filer.md
@@ -6,6 +6,8 @@ However, no SPOF is a must-have requirement for many projects.
 
 SeaweedFS can utilize existing familiar data store, e.g., Cassandra, Mysql, Postgres, Redis, to store the filer metadata.
 
+The following takes Cassandra as an example.
+
 ## Cassandra Setup
 
 Here is the CQL to create the table.CassandraStore.