TechBakra

Systems design is the process of defining the architecture, modules, interfaces, and data for a system to satisfy specified requirements. Systems design could be seen as the application of systems theory to product development In this article, we will learn how we can design a cache Let's begin to design our system, Any system design would have some requirements. Enlisting the same would give us a better idea of what would be the overall limitation of our MVP (Most Valuable Product) Requirements Data size : Let say we will store data like Facebook. Going upwards to few TBs Cache Eviction Strategy : During the course of time, we might not have space to store all the cache entities at that time we need to have a strategy to evict old cache entity like LRU (Least Recently Used) you can read more here Access Patterns for Cache :  Write through cache : In this cache pattern, the write goes through the cache and is marked as successful only after both the cache and database are successfu

Kubernetes works like a wonder in cloud environments like AWS, Azure, or GCE. Many times we do not have a luxury of the above cloud environments. This article helps you to set up an ingress-controller with Nginx as a load balancer in a bare-metal machine. Pre-requisites 3 virtual machines Git installed Centos 7 or any Linux distro Setting up HA Proxy Centos 7 HAProxy is free, open-source software that provides a high availability load balancer and proxy server for TCP and HTTP-based applications that spreads requests across multiple servers Create a virtual machine named HAProxy.  Install haproxy using the yum package   yum install haproxy -y Edit the ha config file and add the following like this vi /etc/haproxy/haproxy.cfg Delete all the section below the defaults section and add the following at last frontend http_front bind *:80 bind :8080 stats uri /haproxy?stats default_backend http_back backend http_back balance round-robin server kube 10.10.10.10:80 s