fio (Flexible I/O tester) is the best utility for benchmarking block devices.
Vitastor has a fio driver which can be installed from the package vitastor-fio.
Use the following command as an example to run tests with fio against a Vitastor cluster:
fio -thread -ioengine=libfio_vitastor.so -name=test -bs=4M -direct=1 -iodepth=16 -rw=write -image=testimg
If you don’t want to access your image by name, you can specify pool number, inode number and size
(-pool=1 -inode=1 -size=400G) instead of the image name (-image=testimg).
You can also specify etcd address(es) explicitly by adding -etcd=10.115.0.10:2379/v3, or you
can override configuration file path by adding -conf=/etc/vitastor/vitastor.conf.
See exact fio commands to use for benchmarking here.