SG0-001 · Question #77
The best practice for ensuring high I/O performance is
The correct answer is C. Spreading the logical volumes across all logical disks using striping.. High I/O performance in storage systems is best achieved by distributing data across multiple physical disks using striping. This parallelizes read/write operations, significantly improving throughput.
Question
The best practice for ensuring high I/O performance is
Options
- AMaking the logical volumes the same size as the physical disk.
- BDedicating the physical disks to logical volumes.
- CSpreading the logical volumes across all logical disks using striping.
- DSpreading the logical volumes across all logical disks using concatenation.
How the community answered
(62 responses)- A8% (5)
- B2% (1)
- C87% (54)
- D3% (2)
Why each option
High I/O performance in storage systems is best achieved by distributing data across multiple physical disks using striping. This parallelizes read/write operations, significantly improving throughput.
Sizing logical volumes to physical disks is a capacity management decision and does not inherently improve I/O performance through parallelization.
Dedicating physical disks to logical volumes relates to resource allocation and isolation but does not provide the performance benefits of parallel I/O operations.
Striping (commonly seen in RAID 0 or as part of other RAID levels) distributes data blocks sequentially across multiple physical disks. This parallel execution of I/O operations across several drives dramatically increases both read and write performance, leading to higher overall throughput.
Concatenation (JBOD) simply combines multiple disks into a single larger logical volume without distributing I/O operations in parallel, thus offering no performance improvement.
Concept tested: Storage I/O performance optimization via striping
Source: https://learn.microsoft.com/en-us/windows/win32/fileio/raid-overview
Topics
Community Discussion
No community discussion yet for this question.