VIRTUAL IO CONTROLLERS AT J-PARC MR USING XEN

The control system for J-PARC accelerator complex has been developed based on the EPICS toolkit. About 90 traditional ("real") VME-bus computers are used as EPICS IOC’s in the control system for J-PARC MR (Main Ring). In 2010-2011, we demonstrated a "virtual" IOC using Xen, an open-source virtual machine monitor. Scientific Linux with an EPICS IOC runs on a Xen virtual machine. EPICS records for oscilloscopes (network devices) are configured. Advantages of virtual IOC are discussed. In addition, future directions are discussed. Plan view of virtual IOC’s for MR operation will be given.