UniversalClient is a one stop client solution for all ( few for now ;) )message brokers and NoSQL DBs. Currently it supports for message brokers like NATS , Kafka and NoSQL Db Redis only. You can find the client in repo : https://github.com/princepereira/Binaries/tree/main/UniversalClientLib Environment $ hostnamectl Operating System: Ubuntu…

LRU or Least Recently Used is the most prominent cache eviction policy used in cache systems. What is the need of Cache ? Microservice or Monolithic based architectures use databases to store information/data. And Databases stores the info in Disks. Accessing (Read/Write) the Disks are resource intensive and time consuming…

Implement Rate Limiter using Token Bucket Algorithms Source Code in Golang package main import ( "fmt" "sync" "time" ) func min(a, b int) int { if a < b { return a } return b } type TockenBucket struct { MaxBucketSize int RefillRate…

HAProxy can be used as Loadbalancer as well as Reverse Proxy. Here will be providing steps to bringup HAProxy as Loadbalancer. Environment Ubuntu 20.04 VM, Docker installed Following are the steps: Bring up multiple web servers Create a docker network sudo docker network create --driver=bridge mynetwork Create Webserver 1 sudo docker…

We can use Apache Jmeter for Evaluating Postgresql DB Bring up Postgresql in Docker Bringup Postgresql in Docker $ mkdir -p $HOME/docker/volumes/postgres $ docker run --rm --name pg-docker -e POSTGRES_PASSWORD=docker -d -p 5432:5432 -v $HOME/docker/volumes/postgres:/var/lib/postgresql/data postgres Login to Postgres Docker $ sudo docker exec -it pg-docker bash Configure Postgresql DB …

Tree operations [Insertion, Inorder, Postorder, Level order] Explained package main import ( "fmt" ) type Node struct { Val int Left *Node Right *Node } func NewNode(val int) *Node { node := &Node{Val: val} return node } func AddNode(head *Node, val int) *Node { if head == nil {…

Prerequisites: Oracle Virtual Box VM 2 CPU, 4 GB RAM, 40 GB HD Ubuntu 18.04 Network Interface: Bridge Adapter Mode & Host only Adapter Install Packages: Setup Docker $ sudo apt-get update $ sudo apt-get install -y docker.io curl $ sudo systemctl enable docker $ sudo systemctl start docker $ sudo groupadd docker…