CompTIA Tech+ (FC0-U71)IT Concepts and TerminologyHard
A technician is evaluating different storage technologies for a database server that requires very high sustained read/write speeds and low latency. Which of the following units of measure would be most critical to consider when comparing the performance of these storage solutions?
- AWatts (W)
- BGigabytes (GB)
- CIOPS (Input/Output Operations Per Second)
- DMegahertz (MHz)
Show answer & explanationAnswer & explanation
Correct answer: C. IOPS (Input/Output Operations Per Second)
For database servers requiring high sustained read/write speeds and low latency, IOPS (Input/Output Operations Per Second) is the most critical metric. It directly measures how many read/write operations a storage device can perform in one second, which is a key indicator of performance for transactional workloads.
Why the other options are wrong
- A. Watts measure power consumption, which is related to efficiency but not direct performance for speed/latency.
- B. Gigabytes measure storage capacity, not performance speed or latency.
- D. Megahertz typically measures CPU clock speed, not storage performance.
IOPS (Input/Output Operations Per Second)
A performance metric that measures the number of discrete read and write operations a storage device or system can handle in one second.
- Crucial for transactional databases and virtualized environments.
- Higher IOPS generally means better performance for many small operations.
- Different for sequential vs. random I/O.
Memory trick: Speed is IOPS, capacity is GB, latency is fast, bandwidth is flow, power is W, clock is MHz. For databases, IOPS is the show!