(taken from RIKEN Acc. Prog. Rep. 1996)

Computing Environment around the Accelerator Research Facility

T. Ichihara and Y. Watanabe, and A. Yoshida In this report, we describe the recent update and improvement of the computing environment around the RIKEN Accelerator Research Facility (RARF). The updats of the computers in this year are indicated by the underline. General description of the data acquisition system at the RARF can be found elsewhere.[1] (1) On-line data acquisition system Currently, seven VAX's are used for CAMAC-based on-line experiments at the RARF. The node names and locations are as follows: GALIS:: Alpha station (B2F E1) GALISF:: VAX 4000/106A(B2F E1) SMART:: Alpha Station (B2F E4) SMARTF:: VAX 4000/106A(B2F E4 ) RIPSVX:: VAX 4000 (B2F RIPS) RIKMV1:: Micro VAX II (1F ) RIKMV2:: Micro VAX II (B2F E3) RIKMV3:: Micro VAX II (Linac ) RIKMV4:: Micro VAX II (B2F E6) Two new VAX 4000/106A computers (GALISF::, SMARTF::) were installed for data acquisitions, and two new Alpha stations (GALIS, SMART) were installed for on-line data analysis and display. Independent measurements and detector tests can be performed without interference. The current version of the data-acquisition system supports a CAMAC multi-crate parallel-readout using multi-J11's (starbursts). Digital audio tapes (DAT) of 2 GB capacity are used for the standard on-line data recording media. (2) Off-line data processing system -1 The following Alpha/VMS and VAX/VMS workstations are available for the off-line data analysis and for general purpose calculations. RIKAXP:: Alpha server 5/250 (Ring 1F) 4 CPU RIKAX1:: Alpha Station 255/233 (Ring 1F) RIKAX2:: Alpha Station 255/233 (Ring 1F) RIKAX3:: Alpha Station 255/233 (Ring 1F) RIKAX4:: DEC 3000-300 (Linac lab.) RIKAX5:: DEC 3000-300 (Atomic lab.) RIKAX6:: DEC 3000-300 (Ring, nuclear theory) RIKAX7:: DEC 3000-300 (Radiation lab.) RIKEN:: (virtual node name of the VAX cluster) RIKVAX:: VAX-4000/106A(Ring 1F) RIKVS0:: DEC 3000-400 (Ring 1F) RIKVS2:: VAX Station 4000-60 (Ring 2F) RIKVS3:: VAX Station 4000-60 (Ring 1F) RIK835:: DEC 3000-400 (Radiation lab.) RIKLV1:: VAX Station 3100 M76 (Linac Lab.) RIKLV2:: DEC 3000-400 (Linac Lab.) Two CPU modules were added in the Alpha server 5/250. As a result, the server equips four CPU's and 512 MB memory. This is utilized as a home machine for the experimental users and also a boot server for AXP workstations. File servers for the experimental data of RIKAX1-3 were replaced from DEC 3000-400 by Alpha Station 255/233. In total eleven alpha workstations and three VAX workstations are used for the data analysis etc. These computers are connected by LAVC (Local Area VAX Clusters) via the FDDI or ethernet. They are also connected to the HEPnet (DECnet) and STA/IM Internet (IP/DECnet) and reachable from all over the world. (3) Off-line data processing system -2 Following FACOM VPP 500 Massive Parallel computers and DEC OSF/1 server and workstation groups have been also used for the off-line data analysis, simulations, and theoretical calculation: FACOM VPP 500 (RIKEN computing center) DEC 7000 (OSF/1) (RIKEN computing center) (4) Wide area computer network connectivities The TISN (Todai International Science Network) was terminated in May 1996. RIKEN is now connected to the STA/IMnet at the speed of $1.5 Mbps$. This will be increased to $6 M bps$ in 1997. Also the RIKEN accelerator research facility is connected to the world-wide network of HEPnet (High Energy Physics NETwork) / SPAN (Space Physics Analysis Network) as Area $40$, which is a part of the DECnet Internet. In order to support these wide area network connections, following three leased lines are used: 1.5 Mbps to STA/IMnet (IP, Decnet) 64 kbps to KEK, Tsukuba (DECnet) 9.6 kbps to Tokyo Institute of Technology (DECnet) (5)Address of the electric-mail The address of the electric-mail for a general user of the RIKEN accelerator research facility is described as follows, where the userid should be replaced by a proper name. (Internet) it userid@rikaxp.riken.go.jp (HEPnet/DECnet) it rikaxp::USERID (or 41823::userid) References 1) T. Ichihara et al.: it IEEE. Transaction. on. Nuclear Science, 35-6, 1628 (1989).