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Zorluk: ZorBlob, File, and Disk Storage Solutions

You are designing the storage configuration for a high-performance transactional database hosted on Azure Virtual Machines. The database has the following requirements:

- The transaction log volume must support up to 8,000 IOPS8,000\text{ IOPS} and 200 MB/s200\text{ MB/s} throughput with consistent sub-millisecond latency.
- You must be able to scale the log volume's IOPS and throughput dynamically during peak processing windows without restarting the virtual machine or detaching the disk.
- Database backups must survive a localized datacenter outage within the primary region without incurring the high latency or costs of cross-region replication during recovery operations.

Which storage configuration should you recommend to meet these requirements?

  1. A
    Premium SSD (v1) for the transaction log volume, and Locally Redundant Storage (LRS) for the backups
  2. Premium SSD v2 for the transaction log volume, and Zone-Redundant Storage (ZRS) for the backupsCevap
  3. C
    Ultra Disk for the transaction log volume, and Locally Redundant Storage (LRS) for the backups
  4. D
    Standard SSD for the transaction log volume, and Geo-Redundant Storage (GRS) for the backups

Cevap

Premium SSD v2 for the transaction log volume, and Zone-Redundant Storage (ZRS) for the backups
The combination of Premium SSD v2 and Zone-Redundant Storage (ZRS) meets all constraints. Premium SSD v2 is designed for sub-millisecond disk latency and supports independent, online adjustments to capacity, IOPS, and throughput without VM downtime. Zone-Redundant Storage replicates backup data synchronously across three availability zones in the primary region, ensuring survival of a localized datacenter outage while avoiding the high latency of restoring from a secondary region.

Adım Adım Çözüm

1
Analyze the performance, latency, and scaling requirements for the transaction log volume.
The workload demands sub-millisecond latency and the ability to scale up to 8,000 IOPS8,000\text{ IOPS} and 200 MB/s200\text{ MB/s} throughput online without virtual machine downtime.
This rules out Standard SSD due to performance constraints, and Premium SSD (v1) because it requires offline operations (disk detachment or VM deallocation) to change provisioned IOPS or throughput.
2
Evaluate the backup storage options based on regional availability and recovery latency requirements.
The backups must survive a localized datacenter (availability zone) outage while keeping recovery latency minimal by avoiding cross-region data transfer.
This eliminates Locally Redundant Storage (LRS), which is vulnerable to datacenter failures, and Geo-Redundant Storage (GRS), which replicates across regions and introduces significant cross-region recovery latency.
3
Select the optimal combination of storage services that satisfies both conditions at the lowest complexity and cost.
Premium SSD v2 satisfies the transactional logging needs (supporting sub-millisecond latency and online performance scaling), while Zone-Redundant Storage (ZRS) provides zone-level resilience for backups within the same region.
Premium SSD v2 offers the exact performance profile needed at a lower price point than Ultra Disk, and ZRS keeps recovery traffic local to the primary region.

Anahtar Kavram

Selecting Azure disk tiers for sub-millisecond latency and dynamic performance scaling, combined with regional replication levels (ZRS) for zone-resilience without cross-region overhead.
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Blob, File, and Disk Storage Solutions

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