Merge pull request #24 from heya-naohiro/heya-naohiro-patch-1

Update Readme.md

Readme.md

@@ -6,8 +6,12 @@
 cargo build
 ```
 
+## Payload Storage
+require cassandra
+
 ## option
 ```
+mqtt server
 
 USAGE:
     mqttserver [OPTIONS]
@@ -17,12 +21,13 @@ FLAGS:
     -V, --version    Prints version information
 
 OPTIONS:
-    -a, --addr <IPADDR>      server's address consist of port [default: 127.0.0.1:8883]
-    -c, --cert <FILEPATH>    server cert @ pem format [default: server.crt]
-    -k, --key <FILEPATH>     server cert @ pem format [default: private.key]
+    -a, --addr <IPADDR>                 server's address consist of port [default: 127.0.0.1:8883]
+    -d, --db_addr <CASSANDRA IPADDR>    server's address consist of port [default: 127.0.0.1:9042]
+    -c, --cert <FILEPATH>               server cert @ pem format [default: server.crt]
+    -k, --key <FILEPATH>                server key @ pem format [default: private.key]
 ```
 
 ## Goal, not Goal
-Not aiming for now: Implementing broker features = Communication between devices other than the host, adding protocols other than MQTT.
+Not aiming for now: Implementing broker features, Communication between devices other than the host, adding protocols other than MQTT.
 
-Future goals: Scaling out, performance measurement.
+Future goals: Scaling out, performance measurement.