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aws certifications

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Amazon Quantum Ledger Database (QLDB)

2023-06-23T06:29:32+00:00

Bookmarks How it Works Common Use Cases Components Of QLDB Performance Scalability Reliability Backup and Restore Security Pricing Limitations Amazon Quantum Ledger Database Cheat Sheet Fully managed ledger database that provides a transparent, immutable, and cryptographically verifiable transaction log ‎owned by a central trusted authority. Used to track all application data changes, and maintain a complete and verifiable history of changes over time Amazon QLDB is serverless.  No capacity provisioning required or setting read/write limits. QLDB transactions are ACID (atomicity, consistency, isolation, and durability) compliant. Amazon QLDB [...]

Amazon Quantum Ledger Database (QLDB)2023-06-23T06:29:32+00:00

Amazon DocumentDB

2023-06-23T06:21:29+00:00

Bookmarks How it Works Performance Scaling Reliability Backup and Restore Security Pricing Limitations Amazon DocumentDB Cheat Sheet Fully managed document database service designed to be fast, scalable, and highly available. Data is stored in JSON-like documents. Compatible with MongoDb. Flexible schema and indexing. Commonly used for content management, user profiles, and real-time big data. How it Works   An Amazon DocumentDB cluster decouples storage and compute. A cluster consists of Cluster volume and Instances Cluster volume refers to the storage layer that spans multiple Availability Zones. Each Availability Zone [...]

Amazon DocumentDB2023-06-23T06:21:29+00:00

AWS DataSync vs Storage Gateway

2024-01-18T06:27:52+00:00

Learn more about the use cases and differences between AWS Data Sync and Storage Gateway in this comparison table:   DataSync Storage Gateway Description AWS DataSync is an online data transfer service that simplifies, automates, and accelerates the process of copying large amounts of data to and from AWS storage services over the Internet or over AWS Direct Connect. AWS Storage Gateway is a hybrid cloud storage service that gives you on-premises access to virtually unlimited cloud storage by linking it to S3. Storage Gateway provides 3 types of storage interfaces for your on-premises applications: file, volume, and tape. How [...]

AWS DataSync vs Storage Gateway2024-01-18T06:27:52+00:00

AWS CloudFormation Deletion Policy

2023-06-03T04:57:38+00:00

Deleting a stack on CloudFormation also removes all the provisioned resources in it. In some cases, you want some resources to be retained even after deleting its stack. The good thing is that you can do this by defining its DeletionPolicy.  This is pretty straightforward - you just need to define DeletionPolicy with Retain value and for the resources that support snapshot, (like RDS databases) you can set Snapshot as its value. With DeletionPolicy: Snapshot, a snapshot is created before a resource is deleted. This allows you to have a backup of the resource that's been deleted from the stack.  [...]

AWS CloudFormation Deletion Policy2023-06-03T04:57:38+00:00

AWS CloudFormation StackSets and Nested Stacks

2023-06-03T04:59:37+00:00

AWS CloudFormation lets you model and provision resources for your environment using programming language, leveraging the concept of Infrastructure as Code (IaC). You don’t need to manually create all of your resources one by one, CloudFormation will do this for you. All resources are defined on the AWS CloudFormation template. This means that this AWS environment can be reliably and easily reproduced since everything is declared on a template. For example, creating a new Test environment similar to your current setup, or when creating a Disaster Recovery environment in another region.  With AWS CloudFormation, you can either upload your own [...]

AWS CloudFormation StackSets and Nested Stacks2023-06-03T04:59:37+00:00

Global Secondary Index vs Local Secondary Index

2024-01-24T09:25:20+00:00

Bookmarks Global Secondary Index Local Secondary Index A secondary index is a data structure that contains a subset of attributes from a table, along with an alternate key to support Query operations. An Amazon DynamoDB table can have multiple secondary indexes.   Global secondary index Local secondary index Definition An index with a partition key and a sort key that can be different from those on the base table. An index that has the same partition key as the base table, but a different sort key.  Span of query Queries on the index can span [...]

Global Secondary Index vs Local Secondary Index2024-01-24T09:25:20+00:00

Which AWS Certification Exam Is Right For Me? – Part 2

2024-03-22T05:42:34+00:00

Bookmarks AWS Certified Security Specialty AWS Certified Advanced Networking Specialty AWS Certified Machine Learning Specialty In this section, we’ll discuss the six (6) AWS Specialty certifications that are currently offered by AWS to help you find out if these certifications are suitable for you. If you haven’t read the first of this 2-part article series yet, we encourage you to check it here: Which AWS Certification Exam Is Right For Me? - Part 1. Similar to Part 1 of this article, we will approach each segment in two parts: Purpose and Knowledge. Purpose will [...]

Which AWS Certification Exam Is Right For Me? – Part 22024-03-22T05:42:34+00:00

Step Scaling vs Simple Scaling Policies vs Target Tracking Policies in Amazon EC2

2023-06-23T05:27:39+00:00

Bookmarks Simple Scaling  Target Tracking Step Scaling  Creating a Step Scaling Policy for an Auto Scaling Group Amazon’s EC2 Auto Scaling provides an effective way to ensure that your infrastructure is able to dynamically respond to changing user demands. For example, to accommodate a sudden traffic increase on your web application, you can set your Auto Scaling group to automatically add more instances. And when traffic is low, have it automatically reduce the number of instances. This is a cost-effective solution since it only provisions EC2 instances when you need them. EC2 Auto [...]

Step Scaling vs Simple Scaling Policies vs Target Tracking Policies in Amazon EC22023-06-23T05:27:39+00:00

AWS Global Accelerator vs Amazon CloudFront

2023-04-08T03:37:31+00:00

In this day and age, your site speed performance is an important factor when it comes to user experience. It is widely recommended for websites to have an average load time of 3 seconds as users tend to abandon the site if a page takes longer than 3 seconds to load. According to Amazon, just 100 milliseconds of extra load time cost them 1% in sales. Indeed, every second counts in our fast-paced digital world. Amazon Web Services has always been the global leader in Cloud Computing with its speed, performance, and reliability. With its breadth of services, AWS gives [...]

AWS Global Accelerator vs Amazon CloudFront2023-04-08T03:37:31+00:00

AWS Support Plans

2023-07-25T06:31:43+00:00

Bookmarks 5 AWS Support Plans Comparison of AWS Support Plans Technical Support Response Times AWS Support Plans Cheat Sheet With hundreds of services and features, AWS provides a combination of various tools, technologies, programs and human resources to proactively help their customers. AWS offers various support plans that customers can choose from based on their needs. 5 AWS Support Plans Basic Developer Business Enterprise On-Ramp Enterprise The Basic Support plan is already available to all AWS customers by default and is free of charge. It also offers support for account and billing questions including [...]

AWS Support Plans2023-07-25T06:31:43+00:00

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