Effect of Block Sizes and Outstanding IO Requests on SSD performance -Samsung 470 250 GB
This blog continues the a series which present test results of extensive testing performed at Velobit to investigate SSD IO bandwidth when SSDs are operated in a simulated enterprise environment. The test set up and procedure is documented in the first blog post of this series which can be found by clicking here.
Test SSD: Samsung 470 Series 250 GB SATA based SSD
Figure 1: IO Bandwidth for Samsung 470 Drive: a) random read b) sequential read
Figure 2: IO Bandwidth for Samsung 470 Drive: a) random write b) sequential write
Figures 1 and 2 shows the results for the Samsung 470 Drive. Like the previous results, the request size determines the performance instead of number of outstanding IO. This device handles random requests very well. We can see that the random read and random write perform almost the same compared with their sequential counterpart, even when the request size is small, e.g., 1 KB.
Come back next week for results and observations on another SSD.