Examkin

Soru

Zorluk: OrtaData Redundancy and High Availability

A startup is deploying a web application that stores user profile documents in an Azure General Purpose v2 (GPv2) storage account. The design requirements are as follows:

* The documents must remain highly available and survive the loss of an entire availability zone in the primary region without administrative intervention or failover.
* The documents must also be replicated to a secondary region to protect against a regional disaster.
* To control costs, the startup wants the most cost-effective option that meets these requirements and does not require read access to the secondary region under normal operations.

Which redundancy option should you recommend?

  1. Geo-zone-redundant storage (GZRS)Cevap
  2. B
    Read-access geo-zone-redundant storage (RA-GZRS)
  3. C
    Geo-redundant storage (GRS)
  4. D
    Zone-redundant storage (ZRS)

Cevap

Geo-zone-redundant storage (GZRS)
Geo-zone-redundant storage (GZRS) meets all constraints by synchronously replicating data across three availability zones in the primary region (surviving a zonal outage without administrative intervention) and asynchronously replicating it to a secondary region (surviving a regional disaster). Since it does not provide active read access to the secondary region, it is the most cost-effective option that satisfies the requirements.

Adım Adım Çözüm

1
Evaluate the primary region resilience requirement.
The primary region must survive an availability zone outage without administrative failover. This requires Zone-redundant storage (ZRS) or Geo-zone-redundant storage (GZRS) as the primary replication mechanism, ruling out Locally redundant storage (LRS) and Geo-redundant storage (GRS).
LRS and GRS replicate data within a single facility in the primary region and cannot tolerate a zonal failure without data unavailability or failover.
2
Evaluate the regional disaster recovery requirement.
The solution must replicate data to a secondary region. This rules out Zone-redundant storage (ZRS) and points to Geo-zone-redundant storage (GZRS) or Read-access geo-zone-redundant storage (RA-GZRS).
ZRS only replicates data within the primary region.
3
Compare the remaining options based on cost and read access requirements.
The startup does not require read access to the secondary region and wants to minimize costs. Geo-zone-redundant storage (GZRS) is selected over Read-access geo-zone-redundant storage (RA-GZRS).
RA-GZRS provides read-only access to the secondary region but is more expensive than GZRS.

Anahtar Kavram

Choosing the appropriate Azure Storage redundancy tier based on zonal resilience, regional disaster recovery, and cost considerations.
Bu soruyu puanla

Konular

Data Redundancy and High Availability

Bu konudan daha fazla soru