Thanks guys reply
I also had try code myself below is my coding
//msg receive by client
socket.on('message', function(message){
pub.publish(channel, message+":"+_channel);
});
//send message to client
sub.on("message",function(channel, message) {
io.sockets.in(channel).emit('message',message);
});
I am no sure it correct or not. but it work under redis~
Regards
Chen