We are currently using CodeIgniter in another project. To handle large traffic (we get around 60k pageviews per day), we load balance between 2 EC2 instances.
Is it possible to load balance using Yii as well? Also, would it be easy to add another server in the cluster using Yii?
I don’t see why not, there is nothing in the files themselves that would prevent it from working. You’re just going to have to figure out how you handle your database between the two nodes. I would do two or more nodes and a single database server, then it would not matter how many nodes you add until you get to the point that the database server can’t handle the load, that’s when things get more complicated.