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You're reading from  AWS Certified Database – Specialty (DBS-C01) Certification Guide

Product typeBook
Published inMay 2022
PublisherPackt
ISBN-139781803243108
Edition1st Edition
Concepts
IT Certification
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Author (1)
Kate Gawron
Kate Gawron
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Kate Gawron

Kate Gawron is a full-time senior database consultant and part-time future racing driver. She was a competitor in Formula Woman, and she aspires to become a professional Gran Turismo (GT) racing driver. Away from the racetrack, Kate has worked with Oracle databases for 18 years and AWS for five years. She holds four AWS certifications, including the AWS Certified Database – Specialty certification as well as two professional Oracle qualifications. Kate currently works as a senior database architect, where she works with customers to migrate and refactor their databases to work optimally within the AWS cloud.
Read more about Kate Gawron

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Understanding replicas and multi-AZ

Many database deployments require high availability or a failover strategy to meet the recovery point objectives (RPOs) and recovery time objectives (RTOs) of the application. RDS offers two different solutions to meet those requirements:

  • Multi-AZ deployments
  • Read replicas

Both of these technologies offer enhanced protection from a primary database failing and will speed up any database recovery strategy, but they use different methods and have different use cases.

Multi-AZ

In Chapter 3, Understanding AWS Infrastructure, we learned about AWS infrastructure, VPCs, and Availability Zones (AZs). A Multi-AZ deployment is one in which you provision a primary database in one AZ and standby databases in one or more different AZs. The primary and standby databases are kept synchronized either using their native replication technology (Always On for SQL Server, for example) or by using an AWS-specific technology. The syncing process...

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AWS Certified Database – Specialty (DBS-C01) Certification Guide
Published in: May 2022Publisher: PacktISBN-13: 9781803243108
© 2022 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Kate Gawron

Kate Gawron is a full-time senior database consultant and part-time future racing driver. She was a competitor in Formula Woman, and she aspires to become a professional Gran Turismo (GT) racing driver. Away from the racetrack, Kate has worked with Oracle databases for 18 years and AWS for five years. She holds four AWS certifications, including the AWS Certified Database – Specialty certification as well as two professional Oracle qualifications. Kate currently works as a senior database architect, where she works with customers to migrate and refactor their databases to work optimally within the AWS cloud.
Read more about Kate Gawron

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