Building a Distributed Key - Value Store with etcd

Introduction

Etcd is an open-source distributed key value store that provides strong consistency and survivability of data. Its major characteristics :

• Distributed Key-Value Store: Etcd is an open-source distributed key-value store.
• Strong Consistency: It provides strong consistency guarantees, ensuring that data is always up-to-date and consistent across the cluster.
• High Availability: Etcd's distributed architecture ensures high availability by replicating data across multiple nodes. This ensures that the system remains operational even if some nodes fail.
• Survivability: It can survive network partitions and node failures, ensuring that data remains accessible and consistent under adverse conditions.
• Use Cases: Etcd is suitable for building highly available applications requiring data integrity and availability, such as service discovery, configuration management, distributed locking, and coordination among distributed systems.
• Simple API: It offers a simple and efficient API for storing, retrieving, and managing key-value pairs, abstracting away the complexities of distributed systems.
• Watch Functionality: Etcd supports watch functionality, enabling real-time notification of changes to data, making it suitable for building reactive and event-driven systems.
• Resilient Architecture: Etcd empowers developers to architect resilient and scalable distributed applications with ease, ensuring data consistency and availability across their infrastructure.

Setting up Single Node Cluster

1. Launch etcd server :

    etcd
    {"level":"info","ts":"2021-09-17T09:19:32.783-0400","caller":"etcdmain/etcd.go:72","msg":... }
    ⋮

2. A single node cluster is setup , refer https://etcd.io/docs/v3.5/quickstart/ .

Running Single Node Cluster

1. Start Single node cluster in terminal

2. Run below command in another terminal to run the program.

python main.py

Demonstration

Functionality

1. Inserting values in key value format
2. Retrieving value given key as input
3. Deleting value given key as input
4. Display all values