You can find plenty of existing discussions where people share performance numbers on these forums, so there is really no need to have yet another "post your speed" one. It's also pointless because you will see people reporting anywhere from a few MB/s (when there are issues) to a few hundreds MB/s depending on their hardware and setup
So, I recommend we rather focus on finding an issue in your setup instead.
I can say that 70MB/s is laughable for pretty much any setup on proper production hardware that I can imagine except perhaps when using NBD over 1 Gbps to grab the source data... thus my questions for a start:
- What processing mode does your job use?
- What is reported as a bottleneck by the job?
If you are not sure what are these, please review the sticky FAQ topic.