Traditional Apps vs Cloud Native Apps

Traditional Applications

Utilizes LOAD BALANCER

• Load balancer manages the amount of requests that go through and processes them to a server
• Can only send users to 1 server, then must move them
• Persistence/Affinity/”Server Sticky” keeps things within the 1 server they exist
  • <<Stateful application<<

Downside

• If server is to die, load balancer will move to another open server, but “shopping cart” will be empty
• You must re login, negative user experience
• You cannot limit the specific amount of servers, because if there is not an open server at a given time, that is a negative user experience

Cloud Native Applications

Utilizes LOAD BLANACER

• these load balancers are “layer 4”, they are not as fancy
• CAN SEND USERS TO ANY SERVER AT ANY GIVEN TIME
  • REPLICATES DATA OVER SERVERS, this allows for any server to be used by anyone
• No sticky
  • <<Stateless application<<
  • SHARED STATE