2022-2-14 learning xiangniuke project - Session Management

HTTP Cookies Can solve stateless problems .
take Cookies Add to HTTP Head , Create a session , Let each request share the same context information

Try to make the server remember the browser , The server gives the browser a cookie, The next browser request will bring cookies Send to the server

demonstration cookie How to send the server to the client

function session/get

session advantage , Save to server , Security , shortcoming , The server is under a lot of pressure
Generally speaking , As far as possible with cookie

viscosity session, Each tour , Always visit and keep it sessionID Server for , problem ： Unbalanced load

Session Sync , Whenever a server is created SessionID, Sync to other servers ,
problem ： Spending big , Large coupling

share session, A certain server , Dedicated to storage session, When other servers need to get session when , Access to the server
problem ： If responsible for storage session My server is down

Put it in the database , Perform cluster backup .
problem ： Read database , Slow speed

Final plan ： Put in redis in