Storage redundancy (LRS, ZRS, GRS) in Azure - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does LRS stand for in Azure Storage redundancy?

LRS stands for Locally Redundant Storage. It keeps three copies of your data within a single data center to protect against hardware failures.

intermediate

How does ZRS differ from LRS in Azure Storage?

ZRS means Zone-Redundant Storage. It stores copies of your data across multiple availability zones within the same region, protecting against data center failures.

intermediate

What is the main benefit of GRS in Azure Storage?

GRS stands for Geo-Redundant Storage. It replicates your data to a secondary region hundreds of miles away, protecting against regional outages or disasters.

advanced

Which Azure Storage redundancy option protects against both data center and regional failures?

Geo-Redundant Storage (GRS) protects against data center failures by replicating data within the primary region and also against regional failures by replicating data to a secondary region.

beginner

Why might you choose LRS over GRS for your Azure Storage?

You might choose LRS because it is cheaper and provides protection against hardware failures within a single data center. It is suitable when you don't need protection against regional outages.

Which Azure Storage redundancy option stores data copies across multiple availability zones within the same region?

A Locally Redundant Storage (LRS)

B Read-Access Geo-Redundant Storage (RA-GRS)

C Zone-Redundant Storage (ZRS)

D Geo-Redundant Storage (GRS)

ZRS replicates data across multiple availability zones in the same region to protect against data center failures.

What does Geo-Redundant Storage (GRS) protect your data against?

A Regional outages by replicating data to a secondary region

B Failures in a single data center

C Only hardware failures in one server

D Only accidental deletion

GRS replicates data to a secondary region far away to protect against regional disasters or outages.

Which redundancy option is the most cost-effective for protecting data within a single data center?

A LRS

B GRS

C ZRS

D RA-GRS

LRS is the cheapest option as it keeps data copies only within one data center.

If you want your data to be available even if an entire Azure region goes down, which redundancy should you choose?

A LRS

B GRS

C ZRS

D None

GRS replicates data to a secondary region, so your data remains available if the primary region fails.

Which redundancy option replicates data synchronously within the same region?

A RA-GRS

B GRS

C LRS

D ZRS

ZRS replicates data synchronously across availability zones within the same region.

Explain the differences between LRS, ZRS, and GRS in Azure Storage redundancy.

Think about where the data copies are stored and what failures each protects against.

When would you choose Zone-Redundant Storage (ZRS) over Locally Redundant Storage (LRS)?

Consider the difference in failure scope and cost.