Scaling Amazon EC2

Scaling Amazon EC2

1. Scalability

   • beginning with only the resources you need

2. EC2 Auto Scaling

   • scaling process to happen automatically
   • dynamic scaling and predictive scaling
     • Dynamic scaling responds to changing demand.
     • Predictive scaling automatically schedules the right number of Amazon EC2 instances based on predicted demand.
   • preparing to launch an application
     • configuring the size of your Auto Scaling group
       • set the minimum number of instances
     • There must be at least one instance running

3. Directing traffic with Elastic Load Balancing

   • High performance
   • Cost-efficient
   • Highly available
   • Automatically scalable
   • Elastic Load Balancing
     • No changes de hourly cost with high traffic
     • Can be used to scale backend in cases of high traffic on frontend

4. Messaging and queuing

   • Tightly coupled architecture
   • Loosely coupled architecture:
     • Single failure won't cause cascading failures
   • Introduce a buffer (queue) between the applications
   • Eliminates cascading failures between applications
   • Amazon SQS
     • Sned messages
     • Store messagens
     • Receive messages
       • Between software components
         • At any values
       • Payload-Data contained within a message
   • Amazon SNS
     • Messages are placed until they are processed
     • Can also send notifications to the end users
       • Amazon SNS Topic
         • A channel for messagens to be delivered
           • to a chanel to all subs of that chanel
         • can be Endpoints
           • Lambda
           • Http/Https
         • email/sms