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Exam AZ-304 topic 3 question 33 discussion

Actual exam question from Microsoft's AZ-304

Question #: 33
Topic #: 3

HOTSPOT -
You plan to develop a new app that will store business critical data. The app must meet the following requirements:
✑ Prevent new data from being modified for one year.
✑ Minimize read latency.
✑ Maximize data resiliency.
You need to recommend a storage solution for the app.
What should you recommend? To answer, select the appropriate options in the answer area.
Hot Area:

Show Suggested Answer

Suggested Answer:

Box 1:

BlockBlobStorage -
Storage accounts with premium performance characteristics for block blobs and append blobs.
Box 2:
Reference:
https://docs.microsoft.com/en-us/azure/storage/common/storage-account-overview https://docs.microsoft.com/en-us/azure/storage/common/storage-redundancy?toc=/azure/storage/blobs/toc.json

by AleIadocicco at May 31, 2021, 1:33 p.m.

Comments

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Jasper666

Highly Voted 4 years ago

premium blockblobs has the best read latency (https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blobs-latency) Maximize data resiliency; for blockbobs are only LRS or ZRS available. (https://docs.microsoft.com/en-us/azure/storage/common/storage-account-overview) So I think the right answer is Blockblob storage and ZRS.

upvoted 70 times

donathon

3 years, 6 months ago

If you create a premium SA, you can only select LRS.

upvoted 2 times

jellybiscuit

2 years, 9 months ago

That is not true. Premium files and premium block blob support ZRS. Only premium page blob does not.

upvoted 2 times

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crazyaboutazure

3 years, 11 months ago

do you even know difference between ZRS and RA GRS? Man there are big minds in this forum

upvoted 4 times

FinMessner

3 years, 5 months ago

It's because you have humans in here that are engineers and then you have humans with a mile long string of certs by their name that can't do a mf thing in the real world.

upvoted 3 times

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examineezer

3 years, 7 months ago

This is a childish and unhelpful comment. Why not just correct whatever incorrect information you have seen at least?

upvoted 11 times

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mehdimed

4 years ago

excellent explanation, just on the storage type, according to https://docs.microsoft.com/en-us/azure/storage/common/storage-account-overview#types-of-storage-accounts , a premium block blob is supported under a "blob storage"

upvoted 3 times

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sandyman

3 years, 8 months ago

Blockblob storage and ZRS is the correct answer. Keyword here is data resiliency, not redundancy. Prem. Block blob Storage are only LRS and ZRS

upvoted 9 times

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protofx

Highly Voted 4 years ago

1st: StorageV2. Reason: Generally recommended by Microsoft, also for immutable storage: https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-immutable-storage 2nd: RA-GRS. Reason: "Maximize data resiliency" requirement. RA-GRA provides six copies total, including three in the primary region and three in the secondary region

upvoted 69 times

crazyaboutazure

3 years, 11 months ago

100% correct as mmutable storage is available for general-purpose v1, general-purpose v2, premium block blob, and legacy blob accounts in all Azure regions. So the key here is what does it at low cost which is General purpose V2. I go with you protofx.

upvoted 4 times

sjai

3 years, 9 months ago

Cost is not a factor here.

upvoted 9 times

STH

3 years, 5 months ago

Yes, the factor is read latency, that is why BlockBlob fits the best And the higher resiliency for this storage is ZRS

upvoted 6 times

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JayBee65

3 years ago

This does not meet the requirements of minimal read latency

upvoted 2 times

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keilah123

4 years ago

Immutable storage is available for Premium BlockBlob storage "Immutable storage for Azure Blob storage enables users to store business-critical data objects in a WORM (Write Once, Read Many) state. This state makes the data non-erasable and non-modifiable for a user-specified interval. For the duration of the retention interval, blobs can be created and read, but cannot be modified or deleted. Immutable storage is available for general-purpose v1, general-purpose v2, premium block blob, and legacy blob accounts in all Azure regions." https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-immutable-storage

upvoted 12 times

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JayBee65

3 years ago

Entirely wrong - this does not meet the requirements. Block Blob Storage to meet Minimize read latency and time-based immutable retention policies ZRS as highest level of resiliency available for Block Blob Storage

upvoted 10 times

LillyLiver

2 years, 12 months ago

I was all set to disagree with you, but I think you're right. The Block BLOB and ZRS does seem to match up. Although, I can't find a resource that lists the read latency for the different storage types. I was going with V2 and RA-GZRS, but RA-GZRS is only available in certain regions. ZRS is allowed in all regions.

upvoted 1 times

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MARKMKENYA

2 years, 4 months ago

when creating a storage account, the premium option says - recommended for scenarios that require low latency

upvoted 2 times

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rxlicon

Most Recent 1 year, 9 months ago

Based on the order Prevent new data from being modified for one year. (WORM - all type blobs have it, v2,v1,prem) ✑ Minimize read latency. premium blockblob ✑ Maximize data resiliency. zrs because that is the max resiliency of a prem blockblob

upvoted 2 times

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muni53

2 years, 7 months ago

Block Blob and ZRS is answer

upvoted 1 times

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GaneshPP

2 years, 8 months ago

BlockBlob storage, ZRS. Cost isnt a factor here, RAGRS not available for blockblob. Simples!

upvoted 1 times

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jellybiscuit

2 years, 9 months ago

You're ether going with: BlockBlobStorage + ZRS -- to minimize read latency or Standard v2 + RA-GRS to maximize data resiliency It depends entirely on which way you prioritize them.

upvoted 2 times

Fal991l

2 years, 9 months ago

make sense!

upvoted 1 times

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AubinBakana

2 years, 10 months ago

(this replaces my previous post) The answer is BlockBlob, ZRS. BlockBlob is a premium service and there's no (RA)GRS option with premium, only ZRS. This has changed over the years and we are also comparing legacy resources with current resources rules and regulations. But there you have it. Answer from the 305 dump.

upvoted 4 times

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AubinBakana

2 years, 10 months ago

The answer is BlockBlob, ZRS. BlockBlob is a premium service and there's no (RA)GRS option with premium, only ZRS. This has changed over the years and we are also compare legacy with current resources. But there you have it. Answer from the 305 dump.

upvoted 3 times

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manojchavan

3 years ago

The key here is data resiliency which means system needs to recover quickly and continue operating when there has been failure. Hence Storage v2 is better options as it has better resiliency options like RA-GRS and RA-GZRS. The block blob options are - LRS, ZRS and hence less resiliency.

upvoted 1 times

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Azure_daemon

3 years, 1 month ago

RA-GRS doesn't meet the minimum latency

upvoted 1 times

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plmmsg

3 years, 3 months ago

BlockBlob ZRS

upvoted 7 times

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blueeagle8

3 years, 5 months ago

Legacy blob is supported by GRS/RA-GRS. See "https://docs.microsoft.com/en-us/azure/storage/common/storage-redundancy#supported-storage-account-types" . I would go with BlobStorage and RA-GRS.

upvoted 1 times

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china5000

3 years, 5 months ago

BlockBlob and ZRS seems to be the right answer

upvoted 2 times

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siddjay

3 years, 5 months ago

It should be StorageV2 and RA-GRS. since BlockBlog does not support RA-GRS. Also here it says BlockBlob NOT PREMIUM BLockBlob. https://docs.microsoft.com/en-us/azure/storage/common/storage-account-overview

upvoted 2 times

therealss

3 years, 4 months ago

If you create a Premium storage account, and select Block blob as the type, and then go back and check the "Account Kind" attribute, you will see it is BlockBlobStorage. If you create a non premium account, the "Account Kind" attribute is StorageV2 (general purpose v2). So BlockBlobStorage implies premium. I would go with BlockBlobStorage / ZRS.

upvoted 1 times

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