Test System and Methodology
We utilize a new approach to HDD and SSD storage testing here at TweakTown for our Enterprise Test Bench. Designed specifically to target the long-term performance of solid state with a high level of granularity, our new SSD testing regimen is applicable to a wide variety of flash devices. From typical form-factor SSDs to the hottest PCIe application accelerators available, we are utilizing this new test regimen to provide accurate performance measurements over a variety of parameters.
Many forms of testing involve utilizing peak and average measurements over a given time period. While these average values can give a basic understanding of the performance of the storage solution, they fall short in providing the clearest view possible of the QOS (Quality Of Service) of the I/O.
The problem with average results is that they do little to indicate the variability experienced during the actual deployment of the device. The degree of variability is especially pertinent, as many applications can hang or lag as they wait for one I/O to complete. This type of testing illustrates the performance variability expected in these types of scenarios while also including a whole host of other relevant data, including the average measurements during the measurement window.
While under load, all storage solutions deliver variable levels of performance that are subject to constant change. While this fluctuation is normal, the degree of fluctuation is what separates enterprise storage solutions from typical client-side hardware. By providing ongoing measurements from our workloads with one-second reporting intervals, we can illustrate the difference between different products in relation to the purity of the QOS while the device is under load. By utilizing scatter charts readers can get a basic understanding of the latency distribution of the I/O stream without directly observing numerous graphs.
Consistent latency is the goal of every storage solution, and measurements such as Maximum Latency only illuminate the single longest I/O received during testing. This can be misleading, as a single 'outlying I/O' can skew the view of an otherwise superb solution. Standard Deviation measurements take the average distribution of the I/O into consideration, but do not always effectively illustrate the entire I/O distribution with enough granularities to provide a clear picture of system performance.
Our testing regimen follows SNIA principles to ensure consistent, repeatable testing. Due to the very nature of NAND devices, it is important that we test under steady state conditions. We attain steady state convergence through a process that brings the device within a performance level that does not range more than 20% from the average speed measured during the measurement window.
We only test below QD32 to illustrate the scaling of the device. However, low QD testing with enterprise-class storage solutions is a frivolous activity if not presented with higher QD results as well. Administrators that have optimized their infrastructure correctly sustain high QD levels, capitalizing on the performance of the premium tier of storage that SSDs provide. With the explosion of virtualization into the datacenter, the high QD performance of the storage solution is the most important metric.
The first page of results will provide the 'key' to understanding and interpreting our new test methodology.
PRICING: You can find products similar to this one for sale below.
United States: Find other tech and computer products like this over at Amazon's website.
United Kingdom: Find other tech and computer products like this over at Amazon UK's website.
Canada: Find other tech and computer products like this over at Amazon Canada's website.
- Page 1 [Introduction]
- Page 2 [Product Positioning and Data Protection]
- Page 3 [Architecture and Management]
- Page 4 [Micron P320h]
- Page 5 [Test System and Methodology]
- Page 6 [4K Random Read/Write]
- Page 7 [8K Random Read/Write]
- Page 8 [128K Sequential Read/Write]
- Page 9 [OLTP and Webserver]
- Page 10 [Fileserver and Emailserver]
- Page 11 [Final Thoughts]
Recommended for You
- We at TweakTown openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion of our content. If any company representative wishes to respond, we will publish the response here.
Latest News Posts
- CON MAN game has arrived on Apple & Android devices
- Ubisoft culls four PC games due to lack of popularity
- Sonic Boom: Fire & Ice hits the Nintendo 3DS on Sept 27
- Lenovo's new Thinkpad X1 Yoga has a 1440p OLED display
- AMD's next-gen Vega graphics cards launch in early 2017
- Asrock EP2C602-4L/D16 memory question?
- were is the 1394 label
- GB's z170x G7's audio compared to G1's
- Overwatch Eichenwalde Map Preview
- 1833MHz memory in Asus PU551LA
- ADATA launches the ultimate SU800SATA 6Gb/s 3D NAND SSD
- CAPE Audio shakes up the headphone industry with the release of Rebellion Headphones
- Tesoro announces ambidextrous, White Sharur SE Spectrum gaming mouse
- Eurocom launches worlds first GTX 1080 SLI VR-Ready laptop
- Thermaltake new Pacific RGB G1/4 PETG Tube 16mm OD 12mm ID 6 liquid-cooling fittings with 1 RGB LED lighting controller