RAID 0 128K Sequential Read/Write
One interesting caveat of RAID testing is the performance impact of different RAID settings. This is very clear with read caching enabled and disabled on the ASR-72405 RAID controller. We observe that the top precondition chart, with read caching disabled, performs with a typical I/O pattern, though the scaling is not very impressive with direct writes to the SSDs.
Enabling read caching provides a huge boost in performance, as shown in the second graph. It also brings out an interesting lattice-like pattern of performance. In our testing for the article we are focusing on the performance of the Intel SSDs, so we conduct all testing, except this small example, without read caching. We will take a deeper look at the varying performance with different caching settings in future RAID controller articles.
The 128K read sequential speeds reflects the maximum sequential throughput of the SSD using a realistic file size encountered in an enterprise scenario. The large array tops out just shy of 3,000 MB/s, while the smaller array peaks at 1,675 MB/s.
128k read latency results indicates the smaller array is more nimble at much lower Queue Depths, where its latency is low and any increasing load does not yield a tangible increase in bandwidth. The larger array reaches the best IOPS/latency ratio at QD64.
The 8-drive array peaks at 1,678 MB/s at QD256, while the 4-drive array provides 857 MB/s at the same Queue Depth. While this is near-linear scaling, there is quite a bit of speed left on the table with each drive only providing 209 MB/s, while they are rated for up to 365 MB/s each.
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 [Intel DCS3700 Architecture]
- Page 3 [Adaptec ASR-72405]
- Page 4 [Test System and Methodology]
- Page 5 [RAID 0 4K Random Read/Write]
- Page 6 [RAID 0 8K Random Read/Write]
- Page 7 [RAID 0 128K Sequential Read/Write]
- Page 8 [RAID 0 Database/OLTP and Webserver]
- Page 9 [RAID 5 4K Random Read/Write]
- Page 10 [RAID 5 8K Random Read/Write]
- Page 11 [RAID 5 128K Sequential Read/Write]
- Page 12 [RAID 5 Database/OLTP and Webserver]
- Page 13 [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
- Far Cry 5 co-op supports full campaign
- Far Cry 5: Everything you need to know
- EVGA teases its GTX 1080 Ti Kingpin, unveil at Computex
- SAPPHIRE announces RX 580 Nitro+ Special Edition
- Oppo R11 launch date and first images of the phone leak
- ASRock AliveXFire-esata2 compatibility with Phenom II X4 980
- m4a88td-m/usb3 & Windows 10
- OWC ThunderBay 4 Mini Thunderbolt 2 Review
- Prey benchmarked: Radeon RX 580 vs. GeForce GTX 1060
- ADATA AI910 Lightning Card Reader Plus Review
- Qualcomm fuels IoT growth by currently delivering more than 1 million chips a day into a wide range of connected applications
- Team Group announces theme for COMPUTEX 2017 showcase: go beyond the limit and reach for the top
- SAPPHIRE announces PULSE Radeon RX 560 graphics card
- ELITEGROUP computer to stand out at Computex for its smart campus deployment, robotic technology, education laptops, tablets, mini PC, and motherboards
- ADATA Shares a Symphony of Technology at Computex 2017