42 Questions
What is the primary purpose of redundancy in Azure Storage?
To protect data from failures and disasters
How are the redundancy settings applied in an Azure Storage account?
Redundancy settings are shared across all storage services in the same storage account
What is the minimum number of copies of data maintained in the primary region for an Azure Storage account?
3
When deciding which redundancy option to use for an Azure Storage account, what is a key factor to consider?
The trade-off between lower costs and higher availability
Which of the following is a valid reason for isolating different types of storage resources in separate Azure Storage accounts?
To apply different redundancy settings to each storage service
What is the primary benefit of the redundancy feature in Azure Storage?
Data protection against failures and disasters
Which redundancy options are supported for Premium file shares?
LRS and ZRS
What is a limitation of ZRS managed disks?
Not supported for unmanaged disks
Which storage account types support hierarchical namespace and specified redundancy options together?
Accounts with hierarchical namespace support enabled
Which storage account types do not support the archive tier for Blob Storage?
ZRS, GZRS, and RA-GZRS accounts
In what scenarios are unmanaged disks not supported by Azure Storage?
For Premium file shares
What does Azure Storage do to ensure data integrity during network traffic?
It conducts integrity verification using redundant data
What is the level of durability offered by Geo-redundant storage (GRS) for storage resources over a given year?
99.99999999999999% (16 9's)
Which type of storage combines high availability across availability zones with protection from regional outages?
Geo-zone-redundant storage (GZRS)
For managed disks, which type of redundancy is supported with certain limitations?
Zone-redundant storage (ZRS)
What kind of storage account supports Geo-zone-redundant storage (GZRS)?
Standard general-purpose v2
During a failover from the primary to the secondary region, what happens to the secondary region?
It becomes the primary region
What is the purpose of copying data to a secondary region that is far away from the primary one?
For disaster recovery
Which option provides read access to data in the secondary region in case of a failover?
Read-access geo-redundant storage (RA-GRS)
What is the main difference between Geo-redundant storage (GRS) and Geo-zone-redundant storage (GZRS)?
GZRS combines high availability across availability zones with protection from regional outages.
What happens to data in a GZRS storage account if an availability zone becomes unavailable?
The data remains writable and readable.
What is the recommended use case for Geo-zone-redundant storage (GZRS)?
Applications requiring maximum consistency, durability, and availability.
What is the minimum durability guarantee provided by Locally Redundant Storage (LRS) for objects over a given year?
99.999999999% (11 nines)
If a disaster such as fire or flooding occurs within the data center where data is stored using Locally Redundant Storage (LRS), what is the risk?
All replicas of the storage account may be lost or unrecoverable.
What is the minimum durability guarantee provided by Zone-Redundant Storage (ZRS) for storage resources over a given year?
99.9999999999% (12 nines)
If an availability zone becomes temporarily unavailable in a ZRS configuration, what happens to read and write operations?
Both read and write operations continue to work, with data accessible from the remaining available zones.
Which of the following scenarios is Zone-Redundant Storage (ZRS) recommended for?
Scenarios that require high availability and resiliency within a region, but not protection against regional disasters.
If a write operation is performed on a storage account using Zone-Redundant Storage (ZRS), when is the operation considered successful?
When the data is written to all three availability zones.
Which of the following storage services supports Zone-Redundant Storage (ZRS) for standard general-purpose v2 storage accounts?
Azure Blobs, Azure Files, Azure Queues, and Azure Tables
Which of the following storage account types supports Zone-Redundant Storage (ZRS) for premium block blobs?
Premium block blob storage accounts
Which of the following statements is true regarding the archive tier for Blob Storage and Zone-Redundant Storage (ZRS)?
The archive tier is not currently supported for ZRS accounts.
Which of the following storage resources does not support Zone-Redundant Storage (ZRS) or Geo-Zone-Redundant Storage (GZRS)?
Unmanaged disks
What is the primary purpose of enabling geo-redundant storage (GRS or GZRS) for an Azure Storage account?
To protect against regional outages by replicating data to another physical location
How can you access data in the secondary region when your storage account is configured for GRS or GZRS?
Data in the secondary region is only accessible for read operations after enabling RA-GRS or RA-GZRS
What happens during the failover process when a storage account switches from the primary to the secondary region?
Your data is inaccessible during the failover process
Which statement is true about the potential for data loss when using geo-redundant storage?
Data loss is possible due to the asynchronous replication between the primary and secondary regions
Which Azure Storage service does not support geo-zone-redundant storage (GZRS)?
File storage (standard file shares)
If your storage account is configured for read access to the secondary region (RA-GRS or RA-GZRS), how can your application read data from the secondary endpoint?
Append the suffix '-secondary' to the account name in the endpoint URL
What is the purpose of enabling read access to the secondary region (RA-GRS or RA-GZRS) for a storage account?
To ensure high availability by allowing data to be read from the secondary region if the primary becomes unavailable
What is the recommended approach for designing applications to take advantage of geo-redundancy in Azure Storage?
Design applications to seamlessly shift to reading data from the secondary region if the primary becomes unavailable
Which statement is true about the consistency of data in the secondary region when using geo-redundant storage?
Data in the secondary region may not be fully consistent due to the asynchronous replication from the primary
What is a key difference between geo-redundant storage (GRS) and geo-zone-redundant storage (GZRS)?
GZRS replicates data to multiple physical locations within the same secondary region
Study Notes
Azure Storage Redundancy
- Azure Storage stores multiple copies of data to protect against planned and unplanned events, ensuring high availability and durability.
Factors to Consider for Redundancy Options
- Lower costs vs. higher availability
- Tradeoffs between redundancy options
- Services that comprise Azure Storage
- Storage account represents a shared pool of storage
Locally Redundant Storage (LRS)
- Replicates data three times within a single data center in the primary region
- Offers at least 99.999999999% durability of objects over a year
- Lowest-cost redundancy option with least durability
- Protects against server rack and drive failures, but not against disasters like fire or flooding
Zone-Redundant Storage (ZRS)
- Replicates data synchronously across three Azure availability zones in the primary region
- Offers at least 99.9999999999% durability of objects over a year
- Provides excellent performance, low latency, and resiliency
- Suitable for scenarios requiring high availability and data governance
- Recommended for Azure Files workloads
Redundancy in a Secondary Region
- Copies data to a secondary region that is hundreds of miles away from the primary region
- Ensures data durability even in the case of a complete regional outage or disaster
- Azure Storage offers two options for copying data to a secondary region: GRS and GZRS
Geo-Redundant Storage (GRS)
- Copies data synchronously three times within a single physical location in the primary region using LRS
- Copies data asynchronously to a single physical location in a secondary region
- Offers at least 99.99999999999999% durability of objects over a year
- Suitable for applications requiring high durability
Geo-Zone-Redundant Storage (GZRS)
- Combines high availability provided by redundancy across availability zones with protection from regional outages
- Copies data across three Azure availability zones in the primary region and replicates it to a secondary geographic region
- Offers at least 99.99999999999999% durability of objects over a year
- Recommended for applications requiring maximum consistency, durability, and availability
Supported Storage Account Types
- Standard general-purpose v2 storage accounts support all redundancy options
- Premium block blobs accounts support ZRS
- Premium file shares (Azure Files) support ZRS
- Managed disks support ZRS with limitations
- Unmanaged disks do not support ZRS or GZRS
Learn about Azure Storage redundancy which stores multiple copies of data to protect from various events. Understand the importance of redundancy in meeting availability and durability targets. Consider the tradeoffs between costs and availability when choosing a redundancy option.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
