Question #98
You are designing a storage solution that will use Azure Blob storage. The data will be stored in a cool access tier or an archive access tier based on the access patterns of the data.
You identify the following types of infrequently accessed data:
✑ Telemetry data: Deleted after two years
✑ Promotional material: Deleted after 14 days
✑ Virtual machine audit data: Deleted after 200 days
A colleague recommends using the archive access tier to store the data.
Which statement accurately describes the recommendation?
A. Storage costs will be based on a minimum of 30 days.
B. Access to the data is guaranteed within five minutes.
C. Access to the data is guaranteed within 30 minutes.
D. Storage costs will be based on a minimum of 180 days.
Correct Answer:D
The following table shows a comparison of premium performance block blob storage, and the hot, cool, and archive access tiers.
| Premium performance | Hot tier | Cool tier | Archive tier | |
|---|---|---|---|---|
| Availability | 99.9% | 99.9% | 99% | Offline |
| Availability (RA-GRS reads) | N/A | 99.99% | 99.9% | Offline |
| Usage charges | Higher storage costs, lower access, and transaction cost | Higher storage costs, lower access, and transaction costs | Lower storage costs, higher access, and transaction costs | Lowest storage costs, highest access, and transaction costs |
| Minimum storage duration | N/A | N/A | 30 days1 | 180 days |
| Latency (Time to first byte) | Single-digit milliseconds | milliseconds | milliseconds | hours2 |
1 Objects in the cool tier on GPv2 accounts have a minimum retention duration of 30 days. Blob Storage accounts don’t have a minimum retention duration for the cool tier.
2 Archive Storage currently supports two rehydration priorities, high and standard, offering different retrieval latencies and costs. For more information, see Rehydrate blob data from the archive tier.
Reference:
https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-storage-tiers