Benchmarks

Unless otherwise specified, nosotros tested using iv WD Blood-red Pro 4TB hard drives. NAS devices with just two bays were tested using RAID one, while those supporting three or more drives ran RAID five. During benchmarking, the NAS device in question was connected directly to a Netgear GS108T v2 switch, while the test PC is always our most high-end desktop using an SSD to read and write the data.

The plan is to commencement reviewing NAS type devices on a more regular basis at TechSpot so we'll be building upward criterion results from this signal frontwards. For at present, but accept the Synology TS-853A to compare against.

The TS-1635 puts those four defended ii.five" SSD drive bays to employ via "SSD cache acceleration" to enhance performance. QNAP says this is perfect for improving the overall workflow of IOPS-demanding applications and allows the best of both price and operation by combining SSDs with HDDs.

For testing nosotros used the OCZ Trion 150 480GB SSD and set it to cache read and writes. There are two modes in which the SSD enshroud can operate, advance random I/O or sequential I/O.

The random I/O mode is described as but storing small random I/O and is best used for virtualization or database applications. So there is the sequential I/O mode which is said to accelerate all I/O operations and is best used for video streaming or large file admission.

For now we have just three types of file transfer tests that we run so it volition be interesting to come across if the SSD cache can help boost performance in these tests.

The 4K video transfer test saturates the Gigabit Ethernet connection without the assist of an SSD cache so adding one wasn't particularly useful here. Perhaps if we were able to take advantage of the 10GbE networking we might have seen some gains here, sadly right at present we don't have the required equipment.

When transferring hundreds of big 36.3 megapixel photos enabling the random I/O mode for the SSD cache improved the write performance by a very slim 2MB/s while the sequential I/O style decreased performance, so mixed results then. Another disappointing upshot can be see when enabling the hardware encryption which reduced read functioning past 36% and saw CPU usage skyrocket.

Finally, we have the website backup exam which is comprised of almost eleven,000 files in 200 folders totaling 1.7GB. Network bandwidth certainly isn't the issue here equally we are capped at around 20MB/s when downloading

Here both cache methods were able to boost the write operation though the read results remained at 21MB/south. Still we did see up to a 25% heave when using the random I/O way as the throughput striking 25MB/southward.