What Are Benchmarking Metrics?

The benchmark test refers to the design of scientific test methods, test tools and test systems to achieve quantitative and comparable tests on a certain type of test object's performance indicators.

Benchmarks cannot replace good designs . No matter whether it is hybrid storage or full flash array, as long as the storage can be properly supplemented, end users will get a sufficiently high IOPS, although the back-end disk performance may not be sufficient and the cache will not be moderate. Therefore, the performance of each storage tier needs to be brought into full play to compensate for defects.

Especially when encountering mixed storage, one thing to consider is the short board effect on performance. Because of this, data that does not require fast access should be placed on relatively stable back-end disks. For example, in some cases, if a 15000-speed disk is used in the back end, even a moderate front-end cache size will not hinder it.

If so, all-flash arrays are easier to measure and evaluate because there is no longer a need to consider the relationship between multi-level storage. In this case, you need to understand the difference between SLC and MLC flash. Although MLC is slower than SLC, what needs to be known is that it is still much faster than traditional hard drives. In many scenarios, MLC may be sufficient to meet the demand for acceleration.