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Exam AZ-900 topic 1 question 2 discussion

Actual exam question from Microsoft's AZ-900
Question #: 2
Topic #: 1
[All AZ-900 Questions]

Your company has datacenters in Los Angeles and New York. The company has a Microsoft Azure subscription.
You are configuring the two datacenters as geo-clustered sites for site resiliency.
You need to recommend an Azure storage redundancy option.
You have the following data storage requirements:
✑ Data must be stored on multiple nodes.
✑ Data must be stored on nodes in separate geographic locations.
✑ Data can be read from the secondary location as well as from the primary location
Which of the following Azure stored redundancy options should you recommend?

  • A. Geo-redundant storage
  • B. Read-only geo-redundant storage
  • C. Zone-redundant storage
  • D. Locally redundant storage
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
RA-GRS allows you to have higher read availability for your storage account by providing ג€read onlyג€ access to the data replicated to the secondary location. Once you enable this feature, the secondary location may be used to achieve higher availability in the event the data is not available in the primary region. This is an
ג€opt-inג€ feature which requires the storage account be geo-replicated.
References:
https://docs.microsoft.com/en-us/azure/storage/common/storage-redundancy https://docs.microsoft.com/en-us/azure/storage/common/storage-redundancy-grs#read-access-geo-redundant-storage

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BinuRaj
Highly Voted 2 years, 5 months ago
Answer is correct. Geo-redundant storage (with GRS or GZRS) replicates your data to another physical location in the secondary region to protect against regional outages. However, that data is available to be read only if the customer or Microsoft initiates a failover from the primary to secondary region. When you enable read access to the secondary region, your data is available to be read at all times, including in a situation where the primary region becomes unavailable. For read access to the secondary region, enable read-access geo-redundant storage (RA-GRS) or read-access geo-zone-redundant storage (RA-GZRS).
upvoted 84 times
RayJr2109
2 months, 2 weeks ago
NOTE: For anyone confused with Option B, this was typed incorrectly. It should be Read-Access, not Read-Only. To support this answer, let's list down the requirements: ✑ Data must be stored on multiple nodes. GRS and RA-GRS store data on two nodes - primary and secondary. ✑ Data must be stored on nodes in separate geographic locations. GRS and RA-GRS copies data from a primary region to a secondary region. ✑ Data can be read from the secondary location as well as from the primary location. As mentioned above, GRS supports this BUT only if the primary region initiates a failover. RA-GRS supports Read-Access for BOTH regions, even when the primary region is still active. Emphasis on "as well as". To reword this requirement: data can be read from both the secondary location AND the primary location. Technically Option A is correct, but Option B provides better availability, and suits the 3rd requirement better. Source: https://learn.microsoft.com/en-us/training/modules/describe-azure-storage-services/3-redundancy
upvoted 5 times
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scab
Highly Voted 2 years, 5 months ago
I think it 's a mistake, it should be "B. Read-access geo-redundant storage" instead of "B. Read-only geo-redundant storage"
upvoted 51 times
IT_Worldwide
6 months, 3 weeks ago
This is correct. It should be "Read-access" and not "Read-only". Official documentation: https://learn.microsoft.com/en-us/azure/storage/common/storage-redundancy#redundancy-in-a-secondary-region
upvoted 4 times
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Annie1805
Most Recent 2 days, 7 hours ago
https://learn.microsoft.com/en-us/training/modules/describe-azure-storage-services/3-redundancy
upvoted 1 times
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ipereira
1 month, 2 weeks ago
Selected Answer: B
answer is B
upvoted 2 times
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intentando
1 month, 2 weeks ago
Agree B, https://learn.microsoft.com/en-us/azure/storage/common/storage-redundancy
upvoted 1 times
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mattpaul
1 month, 2 weeks ago
I passed with these questions and many friends passed too, if you want real exam questions in low price, contact me on [email protected]
upvoted 1 times
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Octy7408
1 month, 3 weeks ago
B. Read-only geo-redundant storage
upvoted 1 times
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LoneJando
2 months ago
B = RA-GRS is the correct answer
upvoted 1 times
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Du_MS900
2 months, 1 week ago
Para atender aos requisitos de armazenamento de dados descritos, você deve recomendar a opção: A. Armazenamento com redundância geográfica O armazenamento com redundância geográfica replica os dados em vários datacenters geograficamente separados, permitindo que você mantenha cópias dos dados tanto no local primário quanto no local secundário. Além disso, os dados podem ser lidos em ambos os locais, tornando-o adequado para cenários de resiliência do site em que você precisa de alta disponibilidade e capacidade de leitura em ambas as localizações geográficas separadas. As outras opções não atendem aos requisitos específicos mencionados, pois não oferecem a mesma combinação de resiliência geográfica e capacidade de leitura nos locais primário e secundário.
upvoted 1 times
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SAFM
2 months, 2 weeks ago
Answer B is correct: "Geo-redundant storage (with GRS or GZRS) replicates your data to another physical location in the secondary region to protect against regional outages. However, that data is available to be read only if the customer or Microsoft initiates a failover from the primary to secondary region. However, if you enable read access to the secondary region, your data is always available, even when the primary region is running optimally. For read access to the secondary region, enable read-access geo-redundant storage (RA-GRS) or read-access geo-zone-redundant storage (RA-GZRS)." https://learn.microsoft.com/en-us/training/modules/describe-azure-storage-services/3-redundancy
upvoted 2 times
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AntonioTech
3 months, 1 week ago
Selected Answer: A
Given the data storage requirements you've provided, the most suitable Azure storage redundancy option would be: A. Geo-redundant storage Geo-redundant storage replicates your data to a secondary region, which is a separate geographic location. This meets the requirement of storing data on nodes in separate geographic locations. Additionally, geo-redundant storage allows you to read data from both the primary and secondary locations, which satisfies the requirement of being able to read data from the secondary location as well. The other options: B. Read-only geo-redundant storage: While this option provides read access to the secondary location, it doesn't store data on nodes in separate geographic locations. C. Zone-redundant storage: This option replicates data within a single region across multiple Availability Zones, but it doesn't meet the requirement of storing data in separate geographic locations. D. Locally redundant storage: This option replicates data within a single datacenter in a region, which doesn't fulfill the requirement of storing data on nodes in separate geographic locations. So, the recommended option is A. Geo-redundant storage.
upvoted 6 times
RayJr2109
2 months, 2 weeks ago
"Geo-redundant storage allows you to read data from both the primary and secondary locations", but according to Microsoft, "only if the customer or Microsoft initiates a failover from the primary to secondary region." With how this question is worded, A can be technically correct, but B allows for better availability. Although if you choose RA-GRS, the data from the 2nd region is always readable. Also how can you say RA-GRS "doesn't store data on nodes in separate geographic locations"? That defeats the purpose of calling it GRS, no? Source: https://learn.microsoft.com/en-us/training/modules/describe-azure-storage-services/3-redundancy
upvoted 1 times
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guru_ji
4 months, 2 weeks ago
Selected Answer: B
the answer is B.
upvoted 3 times
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Soumyat85
5 months ago
The correct answer is - A. Geo-redundant storage Geo-redundant storage meets all the specified requirements. With geo-redundant storage, data is stored on multiple nodes located in separate geographic locations. It provides redundancy across regions, ensuring high availability and data durability. In addition, data can be read from both the primary and secondary locations, allowing for access to the data even if one location becomes unavailable. B. Read-only geo-redundant storage does not fulfill the requirement that data can be written to and read from both the primary and secondary locations. C. Zone-redundant storage is designed for redundancy within a single Azure region, and it does not satisfy the requirement for geographic separation. D. Locally redundant storage does not meet the requirement of storing data on nodes in separate geographic locations.
upvoted 5 times
RayJr2109
2 months, 2 weeks ago
"In addition, data can be read from both the primary and secondary locations, allowing for access to the data even if one location becomes unavailable", but according to Microsoft, "only if the customer or Microsoft initiates a failover from the primary to secondary region." RA-GRS (Option B) provides more availability. "RA-GRS does not fulfill the requirement that data can be written to and read from both the primary and secondary locations." None of the requirements mention that both primary and secondary locations should be "written to" at the same time. You CAN write to both, but only if one location "initiates a failover". Both GRS and RA-GRS supports this. Source: https://learn.microsoft.com/en-us/training/modules/describe-azure-storage-services/3-redundancy
upvoted 1 times
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RVAadmin
5 months ago
The difference between GRS and RA GRS is fairly simple, GRS only allows to be read in the secondary zone in the even of a failover from the primary to secondary while RA GRS allows the option to read in the secondary whenever
upvoted 2 times
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mariza21
5 months, 1 week ago
Selected Answer: A
The correct answer is A. There is no such thing as "Read-Only geo-redundant storage". Four aspects of the redundancy configuration of a storage account determine how your data is replicated and accessible: 1) Local redundancy - your data is always replicated three times within the local or primary region (LRS) 2) Zone redundancy - whether your data is replicated between different zones within the primary region (LRS vs. ZRS) 3) Geo-redundancy - replication within a single "local" region or between a primary and a secondary region (LRS vs. GRS) 4) Read access (RA) - read access to the secondary region when geo-redundancy is used (GRS vs. RA-GRS) The reason you'd pick GRS is because your data is written to your primary node and then replicated to the secondary node. Thus, the system does "write" to both even if the user only writes to one.
upvoted 3 times
RayJr2109
2 months, 2 weeks ago
Option B has been incorrectly worded. It should be Read-Access Geo-Redundant Storage (RA-GRS), as stated in Microsoft's Redundancy article. GRS and RA-GRS "write", AKA replicate data to two locations all the same, it's just that RA-GRS provides more availability as data from the secondary region is ALWAYS readable. Source: https://learn.microsoft.com/en-us/training/modules/describe-azure-storage-services/3-redundancy
upvoted 1 times
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msmt
5 months, 2 weeks ago
With GRS or GZRS, the data in the secondary region isn't available for read or write access unless there's a failover to the primary region. For read access to the secondary region, configure your storage account to use read-access geo-redundant storage (RA-GRS) or read-access geo-zone-redundant storage (RA-GZRS). answer: B
upvoted 1 times
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taianmendes
5 months, 2 weeks ago
Selected Answer: B
simples
upvoted 2 times
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