diff --git a/Filer-Stores.md b/Filer-Stores.md
index e0c1c6f..8c84b10 100644
--- a/Filer-Stores.md
+++ b/Filer-Stores.md
@@ -8,11 +8,11 @@ The Filer Store persists all file metadata and directory information.
 | leveldb      | O(logN)| unlimited | Local, Very Fast               | | Yes| | Default, fairly scalable |
 | leveldb2     | O(logN)| unlimited | Local, Very Fast               | | Yes| | Similar to leveldb, part of the lookup key is 128bit MD5 instead of the long full file path |
 | leveldb3     | O(logN)| unlimited | Local, Very Fast               | | Yes| Yes| Similar to leveldb2, separate leveldb instance for each bucket |
-| RocksDB      | O(logN)| unlimited | Local, Very Fast               | | Native| | Default, fairly scalable |
-| Sqlite       | O(logN)| unlimited | Local, Very Fast               |Atomic| Yes | Yes | Default, fairly scalable, Stream backup |
+| RocksDB      | O(logN)| unlimited | Local, Very Fast               | | Native| | Default, fairly scalable. Need to manually build. |
+| Sqlite       | O(logN)| unlimited | Local, Very Fast               |Atomic| Yes | Yes | Default, fairly scalable, Stream backup. Need to manually build. |
 | Mongodb      | O(logN)| unlimited | Local or Distributed, Fast     | | Yes| | Easy to manage |
 | Arangodb     | O(logN)| unlimited | Local or Distributed, Fast     | | Native| Yes | Easy to manage; Scalable |
-| YDB          | O(logN)| unlimited | Local or Distributed, Fast     |Atomic| Native| Yes | Easy to manage; True elastic Scalability; High Availability |
+| YDB          | O(logN)| unlimited | Local or Distributed, Fast     |Atomic| Native| Yes | Easy to manage; True elastic Scalability; High Availability. Need to manually build. |
 | [Redis2](https://github.com/chrislusf/seaweedfs/wiki/Filer-Redis-Setup)| O(1)   | limited   | Local or Distributed, Fastest  ||Native| | one directory's children are stored in one key~value entry |
 | [Redis3](https://github.com/chrislusf/seaweedfs/wiki/Filer-Redis-Setup)| O(1)   | unlimited   | Local or Distributed, Fastest  ||Native| | one directory's children are spread into multiple key~value entries |
 | Cassandra    | O(logN)| unlimited | Local or Distributed, Very Fast||Native| |                |
@@ -22,11 +22,10 @@ The Filer Store persists all file metadata and directory information.
 | Postgres2    | O(logN)| unlimited | Local or Distributed, Fast    |Atomic| Yes| Yes| Easy to manage |
 | MemSql       | O(logN)| unlimited | Distributed, Fast     |Atomic| Yes| Yes| Scalable |
 | TiDB         | O(logN)| unlimited | Distributed, Fast     |Atomic| Yes| Yes| Scalable |
-| TiKV         | O(logN)| unlimited | Distributed, Fast     |Atomic| Yes| Yes| Scalable |
 | CockroachDB  | O(logN)| unlimited | Distributed, Fast     |Atomic| Yes| Yes| Scalable |
 | YugabyteDB   | O(logN)| unlimited | Distributed, Fast     |Atomic| Yes| Yes| Scalable |
 | Etcd         | O(logN)| unlimited | Distributed, 10,000 writes/sec     || Yes| | No SPOF. High Availability. Limited Capacity.|
-| ElasticSearch| O(logN)| unlimited | Distributed, Fast     || Yes| | Scalable, Searchable |
+| ElasticSearch| O(logN)| unlimited | Distributed, Fast     || Yes| | Scalable, Searchable. Need to manually build. |
 | HBase        | O(logN)| unlimited | Distributed, Fast     | | Native| | Scalable |
 
 #### Switching between different Stores