AWS Database Services
Comprehensive guides and cheat sheets for aws database services. Perfect for developers, architects, and cloud professionals.
Redis Append-Only Files vs Redis Replication
## Core Distinction at a Glance The most important concept to understand is that AOF and Replication solve different problems. - **Append-Only File (AOF):** This is a **DURABILITY** feature. Its g...
Lambda Integration With Amazon DynamoDB Streams
## Objective & Use Cases The goal is to create an automated workflow that captures item-level changes (creations, updates, and deletions) in a DynamoDB table and processes those changes with a Lambda...
Harnessing Real-Time Slack Notifications for Amazon RDS Event Monitoring
## Objective & Use Case The goal is to create an automated pipeline that captures specific events from an Amazon RDS database instance (e.g., failover, instance stopped, backup completed, low storage...
Global Secondary Index vs Local Secondary Index
## What are Secondary Indexes? A secondary index in DynamoDB allows you to query data using an alternate key, in addition to the table's primary key. They are essential for supporting multiple differ...
DynamoDB Scan vs Query
## Core Distinction at a Glance - **`Query` is a targeted search.** It finds items based on a specific Primary Key. It is extremely fast and efficient. - **`Scan` is a full table read.** It exami...
Calculating Required RCU And WCU For Your DynamoDB Table
## Core Concepts - **Write Capacity Unit (WCU):** Represents one write operation per second for an item up to **1 KB** in size. - **Read Capacity Unit (RCU):** Represents read operations per seco...
Aurora Server Tutorial – Part 2
## Objective To create an Aurora Serverless DB cluster, connect to it using the console, and query it programmatically from an AWS Lambda function using the Data API. --- ## Step 1: Create the Clus...
Aurora Serverless Tutorial – Part 1
## What Problem Does Aurora Serverless Solve? Traditionally, managing a database requires you to provision a specific server size and capacity. This leads to common challenges: - **Over-provisioni...
Amazon Aurora Machine Learning
## The Problem It Solves Traditionally, getting an ML prediction for data stored in a database required a multi-step, often slow, process: 1. Build a custom application to extract data from the data...
Amazon Redshift Serverless
## Redshift Serverless vs. Provisioned Redshift The primary difference is the management model and pricing structure. Choosing between them depends on your workload patterns and management preference...
Amazon Redshift
## Core Architecture & Concepts Redshift achieves its performance through a Massively Parallel Processing (MPP) architecture. - **Cluster:** The primary component, which consists of a Leader Node ...
Amazon Quantum Ledger Database (QLDB)
## QLDB vs. Blockchain It's critical to understand that **QLDB is not a blockchain**. | Feature | Amazon QLDB | Blockchain (e.g., Hyperledger, Ethereum) | | :--- | :--- | :--- | | **Trust Model** | ...
Amazon Neptune
## Supported Graph Models & Query Languages Neptune supports two popular open standards for graph models and query languages: ### 1. Property Graph Model (Apache TinkerPop) - **Structure:** Compos...
Amazon MemoryDB for Redis
## Core Concept: A Durable, In-Memory Database The key differentiator for MemoryDB is **durability**. Unlike a traditional cache where data can be lost on a restart or failure, MemoryDB is designed f...
Amazon ElastiCache
## Core Concepts - **Node:** A fixed-size chunk of secure, network-attached RAM, which is the smallest building block of an ElastiCache deployment. Each node runs the engine (Redis or Memcached) yo...
Amazon DynamoDB
## Core Components - **Tables:** A collection of data. Unlike a relational database, a DynamoDB table is schemaless. - **Items:** A single data record in a table. Each item is a collection of att...
Amazon DocumentDB
## Core Architecture Amazon DocumentDB features a cloud-native architecture that decouples storage and compute, allowing each to scale independently. A DocumentDB cluster consists of a cluster volume...
Amazon Aurora
## Core Concepts & Features ### Storage and Reliability - **Self-Healing Storage:** Aurora's storage is fault-tolerant and self-healing. Data is striped across hundreds of volumes. - **High Durabilit...
Amazon RDS
## Amazon RDS Overview Amazon Relational Database Service (RDS) is an industry-standard, fully managed relational database service that automates common administrative tasks such as backups, software...