Problem:

Big Countdown

Elaborate:

A service that handle a big number of request per instant of time. For each request reduce the number by an unit.

Method:

## Vertical Scalling + Client emit signal for server to handle the Countdown + This method requires the technology used be scalable. + Redis + Socket.io: Does the event emit good for this? Can this scale really big? IF so, we can just use this method.

Distributed counting

• Each client instance count for itself, then merged at a certain instance of time.
• This method requires a management system that allocates as well as synchronize the count