VX/LCKMGR is an OpenVMS compatible Lock Manager for Linux and UINIX. VX/LCKMGR uses Sector7 high speed AST backplane. Locvk are granted and tested identically to OpenVMS. SYS$ENQ(W), SYS$DEQ(W), SYS$GETLKI(). VX/LCKMGR is used in production and was stress tested at 80,000 lock conversions per second on an old quadcore Opteron Sever.