DD performance benchmarks
DD is a common utility in linux distributions for measuring disk bandwidth. We include it here as a baseline measurement on all infrastructure to compare raw disk bandwidth performance that any application can potentially achieve. Note that disk bandwidth is not always a good measurement for high volume small block transactions such as a database application might generate. For this you should check the FIO measurements.
The same dd command is used in all cases to provide a fair comparison.
dd if=/dev/xvda of=/dev/null bs=32M count=500 iflag=direct dd if=/dev/zero of=./out.img bs=32M count=500 oflag=direct
|Flavour||Read BW (MB/s)||Write BW (MB/s)|
|AWS r5.2xlarge + 50K reserved iops||449||449|
|SUnlight AWS r5.2xlarge||2024||1228.8|