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Zorluk: ZorData Redundancy and High Availability

A financial services company is designing the storage infrastructure for a transaction auditing application in Azure. The application writes transaction logs to a standard General Purpose v2 (GPv2) storage account. The design must satisfy the following resilience requirements:

- Data must remain highly available even if an entire datacenter within the primary Azure region suffers a catastrophic power or cooling failure.
- In the event of a complete regional outage affecting the primary Azure region, the data must be recoverable from a secondary paired region.

Which two redundancy options should you recommend to meet these requirements?

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

Cevap

The correct redundancy options are Geo-zone-redundant storage (GZRS) and Read-access geo-zone-redundant storage (RA-GZRS).
To survive a datacenter-level outage in the primary region, the storage account must use zone redundancy (ZRS) in the primary region. To protect against a regional disaster, it must replicate to a secondary region. The configurations that provide both primary zone-redundancy and secondary regional replication are Geo-zone-redundant storage (GZRS) and Read-access geo-zone-redundant storage (RA-GZRS).

Adım Adım Çözüm

1
Analyze the primary region resilience requirement.
The requirement states that data must survive the failure of an entire datacenter within the primary region, which necessitates zone redundancy.
Zone-redundancy replicates data across multiple availability zones within a region, protecting against single-datacenter outages.
2
Analyze the regional resilience requirement.
The requirement states that data must be recoverable from a secondary paired region during a complete regional outage, which necessitates geo-redundancy.
Geo-redundancy asynchronously replicates data to a secondary paired region to protect against region-wide outages.
3
Determine which storage redundancy options satisfy both the zone redundancy and geo-redundancy requirements.
Geo-zone-redundant storage (GZRS) and Read-access geo-zone-redundant storage (RA-GZRS) are identified as the correct options.
Both configurations replicate data across three availability zones in the primary region and replicate it to a secondary paired region. Read-access geo-redundant storage (RA-GRS) fails the zone-redundancy requirement in the primary region, and Zone-redundant storage (ZRS) fails the geo-redundancy requirement.

Anahtar Kavram

Selecting Azure Storage redundancy options that combine availability zone protection in the primary region with asynchronous replication to a secondary region.
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