This time, in Azure facilities kindly provided by Microsoft.
We chose Microsoft Azure because of three purposes: a broad geographical spread of virtual servers, a wide range of tools and stable VM work.
Within a few days, the team had deployed an environment. Initially, we intended to set up the network on 150 servers. But it turned out that transactions generator requires more capacity, so eventually, we used 210 virtual servers.
Thus, the test was successful, another one milestone was passed, we are moving on!