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WD Red and Red Pro HDD NAS Performance Analysis in RAID 5 with 10GbE (Page 8)

By Chris Ramseyer from Aug 1, 2014 @ 9:06 CDT

Benchmarks - Multi-Client Test

The Intel NAS Performance Tool (NASPT) is an excellent way to determine NAS performance in a single-user environment. Any review that only uses NASPT assumes that only a single computer will access the target NAS at one time. We took issue with this method of testing and spent over a year designing, building, programming, and finally validating the TweakTown Multi-Client Test.

The test uses Microsoft Office data recorded to traces and played back to the NAS from up to 120 client Windows 7 installations (clients). We record total throughput of all clients and average response time per client.

Over time, we'll populate the two multi-client charts with several NAS products from a span of categories. The products range from a dual Xeon server with two 10GbE ports to a 2-bay NAS with a single gigabit Ethernet connection. The products will fall into their performance categories based on performance and not marketing material or opinion.



Our 120 multiclient office workload is extreme for three drive RAID 5 arrays, but we wanted to give it a shot since we're using a 10GbE network to the Thecus N7710-G drive host. All three arrays perform nearly identically until we get to sixteen clients; that's where we start to see some separation. At twenty-four clients, the Red Pro with 7,200 RPM platters starts to show its dominance and continues to outperform the other two arrays on the chart as expected.

At 104 clients, the latency from the Red 6TB array starts to cause problems, resulting in lower than expected throughput.



Here we see the same test, but now we're looking at the latency. Surprisingly, the Red Pro 4TB didn't walk away from the Seagate NAS 4TB as much as we expected.

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