Test System and Methodology
Our approach testing storage is designed specifically to target long-term performance with a high level of granularity. Many testing methods record peak and average measurements during the test period. These average values give a basic understanding of performance but fall short in providing the clearest view possible of I/O Quality of Service (QoS).
'Average' results do little to indicate the performance variability experienced during actual deployment. The degree of variability is especially pertinent as many applications can hang or lag as they wait for I/O requests to complete. This testing methodology illustrates performance variability and includes average measurements during the measurement window.
While under load, all storage solutions deliver variable levels of performance. While this fluctuation is normal, the degree of variability is what separates enterprise storage solutions from typical client-side hardware. Providing ongoing measurements from our workloads with one-second reporting intervals illustrates product differentiation in relation to I/O QoS. Scatter charts give readers a basic understanding of I/O latency distribution 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 consider latency distribution but do not always effectively illustrate I/O distribution with enough granularity to provide a clear picture of system performance. We use histograms to illuminate the latency of every single I/O issued during our test runs.
We measure power consumption during test runs. This provides measurements in time-based fashion, with results every second, to illuminate power consumption behavior. This significantly affects the TCO of the storage solution. We also present IOPS-to-Watts measurements to highlight the efficiency of the storage solution.
We conduct our tests over the full LBA range to allow each HDD to highlight its average performance. The Seagate Enterprise Performance v7 is a 1.2TB capacity drive, while the WD Xe and the Toshiba AL13SEB900 are both 900GB drives. These varying capacities should be taken into account when viewing results. The first page of results provides the 'key' to understanding and interpreting our 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 [WD Xe 10k Internals and Specifications]
- Page 3 [Test System and Methodology]
- Page 4 [4k Random Read/Write]
- Page 5 [8k Random Read/Write]
- Page 6 [128k Sequential Read/Write]
- Page 7 [Database/OLTP and Web Server]
- Page 8 [File Server and Email Server]
- Page 9 [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
- Nintendo forecasts 10 million Switch sales this year
- Capcom's 2016 financials outline company's future
- Sony shipped about 60 million PS4s
- Next-gen PS4 coming in 2018, analyst predicts
- Acer's new laptop rocks unreleased NVIDIA graphics card
- ASUS USB-AC53 Nano AC1200 Wireless Adapter Review
- GIGABYTE Xtreme Gaming XTC700 CPU Cooler Review
- ASRock 990fx Extreme9 and NVMe support
- HDD to SSD
- Lenovo IdeaCentre Y710 Cube Gaming PC Review
- Get ready for Intel Optane memory with ASRock 200 series motherboards!
- Acer unleashes the Predator Triton 700, a thin yet powerful gaming notebook without compromise
- Acer's new Predator monitors with quantum dot technology deliver spectacular gameplay experiences
- Acer expands its gaming notebook line with the powerful Predator Helios 300
- Western Digital ships fourth-generation Helium Hard Drive platform with Ultrastar He12 12TB advanced storage hard drives