Rironseppyou Network (rironnet)

General information

  • The Rironseppyou Network (rironnet) is the Linux network operated by the Glacier and Ice Sheet Research Group at the Institute of Low Temperature Science, Hokkaido University.
  • The central server is the computer wwwice, which distributes the users (via NIS = Network Information Service), the home directories (via NFS = Network File System) and the websites (via the Apache web server).
  • The home directories are located at /uchi/<username> (= /home/<username>/mnthome). In addition, each user can use work directories such as /work/earth1/<username> etc.

Computing equipment

Model Name (1) Room OS CPU RAM HD Exported directories
Dell Precision T7910 earth 307 OpenSUSE Leap 42.2 2 x 14-Core Intel Xeon E5-2690 v4, 2.6 GHz 128 GB 4 x 2 TB SATA /work/earth1 (930 GB),
/work/earth2 (930 GB),
/work/earth3 (930 GB),
/work/earth5 (930 GB),
/work/earth6 (930 GB),
/work/earth7 (930 GB),
/work/earth9 (1 TB)
Dell Precision T7610 deepthought 306 OpenSUSE Leap 42.2 12-Core Intel Xeon E5-2697 v2, 2.7 GHz 128 GB 2 x 2 TB SATA /work/deepthought1 (930 GB),
/work/deepthought2 (930 GB),
/work/deepthought3 (1 TB)
Dell Precision T7500 hactar 306 OpenSUSE Leap 42.2 2 x 6-Core Intel Xeon X5670, 2.93 GHz 64 GB 2 x 500 GB SATA /work/hactar1 (420 GB),
/work/hactar2 (420 GB)
Dell Precision T7500 eddie 306 OpenSUSE Leap 42.2 2 x Quad-Core Intel Xeon X5570, 2.93 GHz 24 GB 2 x 500 GB SATA ---
Dell Optiplex 990 wwwice (server) 306 OpenSUSE 13.1 Quad-Core Intel Core i5-2400, 3.1 GHz 8 GB 1 TB SATA /uchi
(home directories)

(1) Full name: <name>.lowtem.hokudai.ac.jp


  • A backup of all home directories /uchi/<username> (= /home/<username>/mnthome) is written every night on the external hard disk of the computer wwwice.
  • No backups of the work directories (/work/earth1/<username> etc.) are made.

Rules and hints

  • It is your own responsibility to make regular backups of your personal data
       (on memory stick, portable hard disk, DVD or CD).
          Do not rely fully on the automatic backup of the home directories.
  • Do not eat or drink in the PC room 306, and keep it clean.
  • If you end a working session, please log out and switch off the monitor, but do not switch off the computer.
  • Do not use the server wwwice for regular work.
  • Large data files must not be kept in the home directories /uchi/<username> (= /home/<username>/mnthome).
       Please use one of the work directories instead.
  • If there are any problems, please contact
       Ralf Greve <greve@xxx> or Shin Sugiyama <sugishin@xxx> (xxx = lowtem.hokudai.ac.jp).


  • Compilers:
  • Tools and libraries for parallel computing:
    • Open MPI: Open Source High Performance Message Passing Interface Library.
    • OpenMP: Open Multi-Processing (supported by the Intel Fortran Compiler and the GNU Compiler Collection).
    • BLACS: Basic Linear Algebra Communication Subprograms.
    • Hypre: High performance preconditioners for scalable (parallel) solution of linear systems.
    • Lis: Library of iterative solvers for linear systems (supports OpenMP and MPI-1).
    • MUMPS: Multifrontal parallel direct solver.
    • Pardiso: Thread safe library for solving sparse symmetric and unsymmetric linear systems on shared memory systems (only on zaphod).
    • ParMetis: Parallel library for graphs, mesh partitioning and for ordering of sparse matrices.
    • ScaLAPACK: LAPACK for distributed memory systems.
    • SuperLU: Library for direct solution of large, sparse, nonsymmetric systems of linear equations for distributed memory systems.
  • MATLAB 9.1 (R2016b) (network license for 5 concurrent users).
  • Elmer - Finite Element Software for Multiphysical Problems.
  • GMT - Generic Mapping Tools (data manipulation and plotting software).
  • NetCDF - Network Common Data Form (software libraries and self-describing, machine-independent data formats for scientific data),
    Ncview - NetCDF visual browser, NCO - NetCDF Operators.
  • Typesetting systems LaTeX (with editor kile) and LyX.
  • Version control systems CVS, Subversion and Git.
  • Various Linux standard software (emacs, xemacs, xfig, gnuplot, xv, ImageMagick, GIMP, LibreOffice, ...).
  • Web browsers: Konqueror, Firefox.
  • E-mail clients: KMail, Thunderbird.
  • Japanese language support: canna, kinput2, kterm, tamago.

Printer queues

  • lp - default queue, HP LaserJet 4200n (B/W laser printer) in room 306.
  • iai - Xerox Phaser 8550DP (colour solid-ink printer) in room 306.

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Last modified: 2017-03-22 by Ralf Greve