![]() Similar drop in performance was noted for ATTO and all our real-life benchmarks (robocopy and PCMark 8 storage bench) also. The numbers clearly show a significant drop in performance as the peripheral gets further and further away from the main system. In the second test, we connected the portable SSD to the free Thunderbolt 3 port on the Thunder3 Duo Pro that was farthest from the testbed (in the configuration mentioned at the top of this section). CrystalDiskMark was run with Alpine Ridge acting as a pure USB 3.1 Gen 2 host. In our first test, we connected the portable SSD directly to the Thunderbolt 3 port of the testbed. We studied this aspect further by using the SanDisk Extreme 900 USB 3.1 Gen 2 Portable SSD. Performance ImplicationsÄaisy chaining is a nifty feature, but users must realize that as one goes further down the chain, the performance of the peripheral decreases. That said, as more peripherals start coming out (in the form of docks or even units with 10+ drive bays), Thunderbolt 3 can show its true benefits. However, with two bay devices supporting only SATA drives, it is difficult to sustain more traffic than what we have recorded here. The sequential access numbers show that the link is nowhere near getting saturated despite pushing across more than 1700MBps (not accounting for the DisplayPort bandwidth here). 2x Akitio Thunder3 Duo Pro with 4x Intel SSD DC S3510 + SanDisk Extreme 900 (Thunderbolt 3 + USB 3.1 Gen 2 Daisy Chaining) The table below shows the bandwidth realized as a function of the number of disks accessed simultaneously. We ran the standard 128K sequential accesses with a queue depth of 4 and the 4K random accesses with a queue depth of 32. Including the SanDisk Extreme 900, we ended up with five different physical disks that could be accessed over the single Thunderbolt 3 link. In order to get maximum performance, we set up the two Akitio Thunder3 Duo Pro units in JBOD mode. IOMeter is one of the most reliable tools to measure performance while accessing multiple storage nodes simultaneously. The daisy chain setup is brought out in the photograph below. SanDisk Extreme 900 1.92TB connected to TB3 Port 2 of Thunder3 Duo Pro B.Nixeus Vue-27D 2560x1440 DisplayPort monitor connected to DisplayPort output of Thunder3 Duo Pro B.TB3 Port 2 of Thunder3 Duo Pro A connected to TB3 Port 1 of Thunder3 Duo Pro B.TB3 Port 1 of testbed connected to TB3 Port 1 of Akitio Thunder3 Duo Pro A.AnandTech Skylake DAS Testbed with 2x Thunderbolt 3 (TB3) ports.We performed some testing with the following daisy chain configuration: The design of the Akitio Thunder3 Duo Pro ensures that a DisplayPort monitor does not need to be a link in the daisy chain, but can hang off as a node. With Thunderbolt 3, any USB device with a Type-C interface can terminate the chain. Thunderbolt has always supported DisplayPort monitors at the end of a daisy chain. The full capabilities of Thunderbolt 3 are brought out when we have a series of devices hooked up in a daisy chain fashion to the testbed. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |