How do you design a highly available system?
Here are some of the key resources you can implement to make high availability possible:
- Implement multiple application servers.
- Scaling and slaves matters.
- Spread out physically.
- Maintain a recurring online backup system along with hardware.
- Use of a virtualized server for zero-downtime recovery.
What is high availability design?
High availability (HA) is the ability of a system to operate continuously without failing for a designated period of time. HA works to ensure a system meets an agreed-upon operational performance level. System designers must also pay close attention to the data storage and access technology they use.
What are the characteristics of a high availability web server?
However, there are several characteristics that need to be fulfilled by the web server for high availability. One of the most important characteristics is to implement the servers statelessly or externalize the state so that any running server is able to the server any subsequent requests.
Is it possible to make a web server highly available?
By using an Application Load Balancer (which is highly available with the redundancy across multiple Availability Zones) along with a self-initiating fleet of web servers (EC2 instances), it is possible to make the web server highly available.
Which is the best multi-region web application architecture?
Download a Visio file of this architecture. This architecture builds on the one shown in Improve scalability in a web application. The main differences are: Primary and secondary regions. This architecture uses two regions to achieve higher availability. The application is deployed to each region.
How to design a high availability application architecture?
Your web server should be stateless. Spin up three or four and put them behind a load balancer. That solves your uptime worries there. As Frederik mentioned earlier, you can also do rolling deployments this way. Your web service should probably be stateless.