I have to answer myself again.
I tried reverting to drbd 8.3.11 on my test setup.
This again leaded to some interesting observations.
When running 8.3.11 on both my virtual machines the average request size
lowers but it is by far not as low as 4k.
This seems to be correct as according to
http:/
Hello again!
I did some further testing and performance tuning. I was able to rise the
average throughput a bit with large max-buffers and changing the i/o
scheduler but the drbd throughput is still way behind the max throughput of
the raw devices, while i/o wait is still going through the roof.
