[Design-Data-Intensive-Application] Scalability

1 scale up

• better cpu
• better sever

2 scale out

Weibo / post / user / follow

1)  post

• select post from posts join users on p.send_id = u.id join follows on f.id = u.id where cur_id = f.followee.id (read)

• celebrity -> wirte posts to every follower

throw put. (requests / per second )

response time . (client)

latency  (sever)