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QSAN XN8008T NAS Review (Page 3)

By Chris Ramseyer from Dec 18, 2018 @ 0:41 CST

Server Workloads



In this section, we move our attention over to server workloads starting with the database. In the workloads, we also see the effects of flash-based cache in the form of higher performance, lower latency, and often increased consistency.

The biggest factor though is still the processing power of the NAS. In these tests, we loaded the same number of Seagate IronWolf Pro 12TB HDDs into both systems. The QSAN uses the Intel Core i5 quad-cores, and the Thecus uses an Intel Core i3 with dual cores.



The OLTP test is very similar to the database test we just looked at. The statements from the last section carry over to this workload.



The email workload more data sizes than the database and online transaction processing workloads. This test requires more hard disk drive interaction with less of the data falling into a cache on the system. Again, we see strong performance scaling with the QSAN than the processor-limited Thecus. The QSAN system armed with a strong consumer MLC SSD delivers a 4x increase in the amount of IO data over the Thecus system.

Archival File Server


The archive test comes from Dell in the SIM-Real-World_Workload-2.1.0.icf file was last updated by J.Heinz on March of 2016. We made some changes to the length and queue depth of the test but stayed true to the file access and distribution.

Multiclient Office Workload


The Multiclient test uses an array of Xeon powered servers to work the NAS from multipole points. Each "client" is a Hyper-V instance with a dedicated CPU core, operating system, and gigabit Ethernet port. The software runs a series of Office software with the data on the NAS under test. The workload is the same for each client, but offset in each instance, so the NAS isn't reading the same file and then distributing the data to several machines in parallel from identical requests.

We had issues getting the SSD cache to "warm up" in this test for some unknown reason. This is a test we expected the XN8008T run circles around the two year old Thecus N8880U-10G. It's not that the XN8008T performed poorly. In the chart, we also included a Drobo 810N to show the performance of a prosumer system.

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