(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).