Real-time message processing or stream processing systems are a need today. There are many examples in the world of IOT, Mobile push messaging, social media, etc.
- Heart of such systems is an enterprise class stream processing system such as Kafka,
Tag: System design
Disaster Recovery Strategies
The following are the commonly followed strategies in the increasing order of Recovery Time Objective (Time taken to restore once disaster strikes) and cost.
- Backup and Restore – Complete offline. High recovery time and data loss. Less expensive.
- Pilot light
Disaster Recovery planning – Key terms
Recovery Time Objective (RTO) – The time it takes to restore the system after the disaster strikes. It’s usually expressed in hours.
Recovery Point Objective (RPO) – The acceptable amount of data loss if disaster strikes. It’s also expressed in … read the rest.
Horizontally scaling systems (Scale out)
Just thought to record the horizontal scaling options I came across so far.
- Connected and stateless – Requests in this scenario are synchronous (connected), meaning request is processed immediately and response served. Till then connection to kept open. Servers are
Sample fault tolerant deployment in AWS
Architecture courtesy: acloud.guru
Sample AWS fault tolerant architecture in AWS demonstrated using wordpress deployment.
- Hosted in single region.
- 2 security groups setup in a VPC. One web facing – Web DMZ and other private – RDS security group.
- 2 Availability
AWS Content & Media serving app architecture
Minimalist AWS based architecture for content and media serving web apps.
Source: AWS reference architecture.… read the rest.
Software Architecture styles
- Component based architecture. – Example, JEE.
- Layered architecture. – Example, JEE.
- Pipe & filter (or pipeline) – Output of one feeds into another component. Buffering may be required in between. – Example, Analytics ETL, data pipeline.
- Data centric (or database
