Chapter 3 of 4 · Microsoft AZ-305
Design business continuity solutions
Recovery objectives, Site Recovery, Azure Backup and high availability for compute, data and storage.
- 4topics
- 21 minfast track
- 2diagrams and exhibits
- 15–20%of the exam
Topics in this chapter
Take them in order, or jump to the one you need.
- 1Recovery Objectives and Azure Site RecoveryAZ-305 disaster recovery: turn RTO and RPO into a design, use Azure Site Recovery with recovery plans and test failover, and trim…Diagram5 min
- 2Backup Solutions for Compute, Databases and Unstructured DataAZ-305 backup design: Azure Backup vaults and policies for VMs, SQL, Files and Blobs, immutable vaults, cross region restore and…5 min
- 3High Availability for ComputeAZ-305 compute availability: availability zones, availability sets, scale sets, load balancer zone redundancy, platform service…Diagram6 min
- 4High Availability for Relational and Unstructured DataAZ-305 data availability: zone redundant SQL and PostgreSQL, failover groups, Always On on VMs, Cosmos DB multi region, and…5 min
About this chapter
What this chapter covers
Systems fail, so designs must say how they recover. This domain is worth 15 to 20 percent of the exam. It covers translating recovery objectives (RTO and RPO) into a disaster recovery design with Azure Site Recovery, designing backups for compute, databases and unstructured data, and designing high availability within a region and across regions.
The key skill is matching how fast and how much data loss the business accepts to the cheapest design that meets it.
How the topics fit together
- Recovery objectives and Azure Site Recovery covers RTO, RPO, replication, recovery plans and drills.
- Backup solutions for compute, databases and unstructured data covers vaults, policies and retention.
- High availability for compute covers zones, availability sets, scale sets and SLAs.
- High availability for relational and unstructured data covers zone redundancy, failover groups and storage redundancy.
Always separate three ideas: high availability (survive a failure automatically), disaster recovery (recover from a region loss) and backup (recover from deletion or corruption). A design often needs all three.
How to use these pages
Each topic page has the same shape, so you can skim for what you need.
- What it is: the idea in plain words.
- How it works: the mechanism, with examples and tables.
- What to remember for the exam: the facts to memorise and how questions are phrased.
- Common mistakes: the classic traps.
- Check yourself: three questions to test your understanding.
Ready for more practice?
The full Microsoft AZ-305 question bank has 755 questions, with timed practice exams and an explanation for every answer.
This study guide is independent and is not affiliated with, endorsed by, or sponsored by Microsoft. Vendor names, certification names and exam codes are trademarks of their respective owners and are used for identification only.