Book: add mention about shard awarness
All queries are shard aware, it's good idea to mention that.
@@ -12,6 +12,9 @@ Each of these basic load balancing strategies can be wrapped in `TokenAwarePolic
> **Note**
> Only [prepared queries](../queries/prepared.md) use token aware load balancing
+All queries are shard aware, there is no way to turn off shard awareness.
+If a token is available the query is sent to the correct shard, otherwise to a random one.
+
So, the available load balancing policies are:
* [Round robin](robin.md)
* [DC Aware Round robin](dc-robin.md)
