Hi Francis,

Thanks for your reply.

Since I'm a newbie to Nginx, I'm sorry that I don't quitely understand the questions.
Now, we are running a small business. So we don't have any load-balance or fail-over deployment. So far, we have only 1 Nginx + 1 serverA + 1 serverB.

As for the rewrite, I did some research and found that it seems that only URL rewrite can help in my scenario. Technically, do you think the URL rewrite rules is correct? Maybe there are some syntax errors?