https://www.softaculous.com/board/index.php?tid=4551 https://www.softaculous.com/board/index.php?tid=4551&tpg=0#p15873 http://www.loadui.org/)
is my suggestion as an open source Load Testing solution that is free
and cross-platform. Very useful to test our servers deployed with
Virtualizor, whatever alone or clustered.

"With a visual,
drag-and-drop interface, it allows you to create, configure and
redistribute your Load Tests interactively and in real-time. In a single
test environment, loadUI provides complete test coverage and supports
all the standard protocols and technologies. And it’s so powerful, it
generates scalable, high-volume and real-world load from any number of
local and remote computers. Meet loadUI, the future of Load Testing". ]]> Tue, 08 Oct 2013 08:36:57 GMT https://www.softaculous.com/board/index.php?tid=4551&tpg=0#p15873