Also https://blogs.vmware.com/vmtn/2008/08/introducing-rep.html https://blogs.vmware.com/vmtn/2008/08/introducing-rep.html which is IMO the most technically imp

Also https://blogs.vmware.com/vmtn/2008/08/introducing-rep.html https://blogs.vmware.com/vmtn/2008/08/introducing-rep.html which is IMO the most technically impressive variant, though sadly long gone..