diff --git a/server/cmd_server.go b/server/cmd_server.go
new file mode 100644
index 0000000..953c70e
--- /dev/null
+++ b/server/cmd_server.go
@@ -0,0 +1,106 @@
+package server
+
+import (
+	"github.com/siddontang/ledisdb/ledis"
+	"strconv"
+	"strings"
+)
+
+func pingCommand(c *client) error {
+	c.resp.writeStatus(PONG)
+	return nil
+}
+
+func echoCommand(c *client) error {
+	if len(c.args) != 1 {
+		return ErrCmdParams
+	}
+
+	c.resp.writeBulk(c.args[0])
+	return nil
+}
+
+func selectCommand(c *client) error {
+	if len(c.args) != 1 {
+		return ErrCmdParams
+	}
+
+	if index, err := strconv.Atoi(ledis.String(c.args[0])); err != nil {
+		return err
+	} else {
+		if c.db.IsInMulti() {
+			if err := c.script.Select(index); err != nil {
+				return err
+			} else {
+				c.db = c.script.DB
+			}
+		} else {
+			if db, err := c.ldb.Select(index); err != nil {
+				return err
+			} else {
+				c.db = db
+			}
+		}
+		c.resp.writeStatus(OK)
+	}
+
+	return nil
+}
+
+func infoCommand(c *client) error {
+	if len(c.args) > 1 {
+		return ErrCmdParams
+	}
+	var section string
+	if len(c.args) == 1 {
+		section = strings.ToLower(ledis.String(c.args[0]))
+	}
+
+	buf := c.app.info.Dump(section)
+	c.resp.writeBulk(buf)
+
+	return nil
+}
+
+func flushallCommand(c *client) error {
+	err := c.ldb.FlushAll()
+	if err != nil {
+		return err
+	}
+
+	c.resp.writeStatus(OK)
+	return nil
+}
+
+func flushdbCommand(c *client) error {
+	_, err := c.db.FlushAll()
+	if err != nil {
+		return err
+	}
+
+	c.resp.writeStatus(OK)
+	return nil
+}
+
+func readonlyCommand(c *client) error {
+	if len(c.args) != 1 {
+		return ErrCmdParams
+	}
+
+	if flag, err := strconv.Atoi(ledis.String(c.args[0])); err != nil {
+		return err
+	} else {
+		c.app.ldb.SetReadOnly(flag != 0)
+		c.resp.writeStatus(OK)
+	}
+	return nil
+}
+
+func init() {
+	register("ping", pingCommand)
+	register("echo", echoCommand)
+	register("select", selectCommand)
+	register("info", infoCommand)
+	register("flushall", flushallCommand)
+	register("flushdb", flushdbCommand)
+}
diff --git a/server/command.go b/server/command.go
index 0c66542..1c54c90 100644
--- a/server/command.go
+++ b/server/command.go
@@ -2,8 +2,6 @@ package server
 
 import (
 	"fmt"
-	"github.com/siddontang/ledisdb/ledis"
-	"strconv"
 	"strings"
 )
 
@@ -18,88 +16,3 @@ func register(name string, f CommandFunc) {
 
 	regCmds[name] = f
 }
-
-func pingCommand(c *client) error {
-	c.resp.writeStatus(PONG)
-	return nil
-}
-
-func echoCommand(c *client) error {
-	if len(c.args) != 1 {
-		return ErrCmdParams
-	}
-
-	c.resp.writeBulk(c.args[0])
-	return nil
-}
-
-func selectCommand(c *client) error {
-	if len(c.args) != 1 {
-		return ErrCmdParams
-	}
-
-	if index, err := strconv.Atoi(ledis.String(c.args[0])); err != nil {
-		return err
-	} else {
-		if c.db.IsInMulti() {
-			if err := c.script.Select(index); err != nil {
-				return err
-			} else {
-				c.db = c.script.DB
-			}
-		} else {
-			if db, err := c.ldb.Select(index); err != nil {
-				return err
-			} else {
-				c.db = db
-			}
-		}
-		c.resp.writeStatus(OK)
-	}
-
-	return nil
-}
-
-func infoCommand(c *client) error {
-	if len(c.args) > 1 {
-		return ErrSyntax
-	}
-	var section string
-	if len(c.args) == 1 {
-		section = strings.ToLower(ledis.String(c.args[0]))
-	}
-
-	buf := c.app.info.Dump(section)
-	c.resp.writeBulk(buf)
-
-	return nil
-}
-
-func flushallCommand(c *client) error {
-	err := c.ldb.FlushAll()
-	if err != nil {
-		return err
-	}
-
-	c.resp.writeStatus(OK)
-	return nil
-}
-
-func flushdbCommand(c *client) error {
-	_, err := c.db.FlushAll()
-	if err != nil {
-		return err
-	}
-
-	c.resp.writeStatus(OK)
-	return nil
-}
-
-func init() {
-	register("ping", pingCommand)
-	register("echo", echoCommand)
-	register("select", selectCommand)
-	register("info", infoCommand)
-	register("flushall", flushallCommand)
-	register("flushdb", flushdbCommand)
-}