Test System and Methodology
We utilize a new approach to RAID storage testing with our Enterprise Test Bench, which 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 QoS (Quality of Service).
'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 executing a workload, all storage solutions deliver variable levels of performance. 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 also use latency plots to illustrate latency scaling under various workloads.
The first page of results will provide the 'key' to understanding and interpreting our new test methodology. In replicated environments, RAID 0 can be a compelling choice for bleeding edge performance. RAID 5 provides a layer of data security that protects from the loss of a drive. We are testing both RAID 0 and RAID 5 in this evaluation. This evaluation consists of tests with default settings conducted on a LSI 9271-8i with a direct connection. We conduct our tests over the full LBA range to allow each HDD to highlight its average performance. Short stroking can increase performance at the loss of capacity.
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 [Test System and Methodology]
- Page 3 [RAID 0 4K Random Read/Write]
- Page 4 [RAID 0 128K Sequential Read/Write]
- Page 5 [RAID 0 Server Workloads]
- Page 6 [RAID 5 4K Random Read/Write]
- Page 7 [RAID 5 128K Sequential Read/Write]
- Page 8 [RAID 5 Server Workloads]
- Page 9 [Final Thoughts]
- 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
- Head of Sony VR resigns to work on other VR projects
- Paragon PlayStation 4 test allows for PC cross-play functionality
- Sonic the Hedgehog movie in the works with Sony at the helm
- North Korean Satellite tumbling out of control, not even functional
- DriveClub update brings hardcore handling to let you crash easier
- Intel Compute Stick "2" STK1AW32SC 2GB Windows 10 Review
- Cougar 450M Ambidextrous Optical Gaming Mouse Review
- ASRock Fatal1ty Gaming Z170 Gaming K4 - Only Posts with one memory stick
- TP-LINK Archer C2600 MU-MIMO Wireless Dual-Band Router Review
- [SSD compatibility question] GA-X58A-UD3R with Samsung EVO Pro SSD
- ESL Hearthstone Legendary Series returns to Intel Extreme Masters Katowice 2016
- HIDEO KOJIMA AND GUILLERMO DEL TORO CONFIRMED AS D.I.C.E. SUMMIT KEYNOTE SPEAKERS
- Toshiba Introduces the Next Generation OCZ Trion 150 Series Solid-State Drive Series
- Thermaltake Kicks Off 2016 MFC (Modding Fighting Championship)
- AMD Offers New Thermal Solutions and New Processors for Reliable, Near-Silent Performance