System Design | Implementation Rule Book | CheatSheet

Real: wall clock time – time from start to finish of the call. User: the amount of CPU time spent in user-mode code (outside the kernel) w...

Steps to do rolling restart of ES cluster: sudo su root docker ps -a docker stop/start <I_ID> docker exec -it <IMG_Id> /bin/bash...

1.  Stream to Map Map<Integer, String> result3 = list.stream().collect( Collectors.toMap(x -> x.getId(), x -> x....

Creational Structural Behavioural Abstract Factory Assember Accumumator ...

Dynamically create your own BeanDefinition BeanDefinitionRegistryPostProcessor has a hook on the BeanDefinitionRegistry @Component public cl...

About Terraform: A declarative language,  not a programming language. Which keeps its state recorded when we run again it compares the new a...

This blog covers the basics of terraform a declarative language for managing infrastructure as code.  Download link:  brew install terraform...

VPC: Egress-only internet gateways: - allows outbound communication over IPv6 from instances in your VPC to the internet, and preven...