70-473 · Question #81
You have a failover cluster deployed to Microsoft Azure virtual machines. You plan to deploy a new Microsoft SQL instance to the cluster. The instance will host one database that has 10 file groups. Y
The correct answer is C. a storage space. To provide the fastest possible reads for a SQL instance with 10 file groups distributed across 10 disks in an Azure failover cluster, implementing a storage space is the recommended solution.
Question
Options
- Adynamic disks that use striping
- Bone file group per disk
- Ca storage space
- Ddynamic disks that use mirroring
How the community answered
(32 responses)- A6% (2)
- B9% (3)
- C56% (18)
- D28% (9)
Why each option
To provide the fastest possible reads for a SQL instance with 10 file groups distributed across 10 disks in an Azure failover cluster, implementing a storage space is the recommended solution.
Dynamic disks are a legacy storage management technology in Windows and are generally not recommended for new deployments or for optimal performance and compatibility with modern Azure IaaS environments or failover clusters, unlike Storage Spaces.
While placing one file group per disk is a good practice for I/O separation, simply using individual disks does not provide the aggregated read performance benefits that can be achieved by combining multiple disks into a single striped storage solution like a Storage Space.
A storage space can aggregate the I/O capabilities of multiple underlying disks by configuring it with striping, similar to RAID 0 or RAID 5/6 with performance benefits. This allows the 10 provisioned disks to work in parallel, significantly increasing the aggregate read throughput for the database file groups distributed across this pooled storage, thus providing the fastest possible reads.
Dynamic disks are an outdated technology, and while mirroring provides data redundancy, it typically does not offer the same level of aggregated read performance as a striped storage solution derived from multiple disks.
Concept tested: Windows Server Storage Spaces, SQL Server I/O performance
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-overview
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