location: compute_resources

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Compute Resources

  • In general, the offers are limited to members of I-MATH and their students.
  • Other UZH members are welcome to contact support@math.uz.ch.

  • First time user: contact support@math.uzh.ch first.

Reservations

  • Short (<1day) computations don't need a reservation,

  • Longer (>1day) are reccomended to do reservation.

  • With reservation: In case of maintenance need, we typically schedule the maintenance according the needs of the user.
  • Without reservation: We try to contact the user and wait several hours for an answer.
  • General: if we see running computations, we always contact the user first (independent if a reservation exist). If the user doesn't answer (weekend, holiday, ...) we decide by our own what to do.

Offers

  • For small / ad hoc computations, just start the compute software via the thinlinc environment.
  • For medium computations, please contact support@math.uzh.ch to ask for the best fitting possibilty and to reserve nodes.

  • For large computations and professional support please check http://www.s3it.uzh.ch/.

Resources at IMATH

host

CPU type

cores

RAM

local disk

date

purpose

CPU specs

asprey

2 x Intel Xeon 4C E5-2643 3.30 GHz

16 (HT enabled)

128 GB

73 GB

12/2012

student: matlab, mathematica, maple, R

E5-2643

baxter

8 x Intel Xeon 8C X7550 2.00 GHz

64 (HT disabled)

512 GB

300 GB

10/2010

research, magma

x7550

crous

8 x Intel Xeon 10C E7-2850 2.0 GHz

80 (HT disabled)

2 TB

300 GB

05/2013

research

E7-2850

david

"

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estonia0

2 x Intel Xeon 6C E5-2640 2.50 GHz

12 (HT disabled)

256 GB

2TB

05/2013

research

E5-2640

estonia1

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jordan0

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professor & assistant: matlab, mathematica, maple, R

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courses

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courses

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Concept

Access

  • The compute nodes can be accessed by SSH only from inside I-MATH.

  • Use thinlinc

    • matlab, mathematica, maple, R, rstudio: just start the application via menu 'Applications > Science > ...' - you'll automatically redirected to the appropriate compute server.

    • For non standard compute software please first log on the compute node via 'ssh', than start the program.
  • SSH: Log on 'ssh.math.uzh.ch' and jump to the compute node again via 'ssh'.

Operating System

  • Ubuntu LTS (Linux) - all compute servers.
  • Very very limited software might be installed on some Windows virtual machines.

Storage

  • If you need more than 1GB disk space, please contact support@math.uzh.ch.

  • Remote (NFS)
    • <1GB disk space: Personal Home directory

    • >1GB disk space: /compute/<account>

  • Local
    • /export/user/<account>

Programs / Software

  • All compute servers use the same applications and versions as installed on the thinlinc terminals.
  • Please report missing or outdated software or wishes to support@math.uzh.ch.

  • There is no Intel C or Fortran Compiler.
  • If you need other program versions than the default one: open a terminal, type the program name followed by two 'TAB' presses: this will show all available versions of the specified program.

Parallel computing

  • Cluster software
    • Not installed / offered at I-MATH.
    • Various MPI packages and libs are installed. Compiling and preparation to run programs later on a distributed compute cluster are possible.
  • Some programs, like matlab, offers limited builtin auto parallelization.

  • All of the compute nodes are shared memory machines. It's reasonable to start as many programs in parallel as long the load is less or equal the number of cores.

    • Determine the load by using the command uptime via a terminal. The last three numbers are the average number of jobs (=load) in the run queue over the last 1, 5 and 15 minutes.

      $ uptime
       15:55:20 up 22 days, 24 min,  1 user,  load average: 11.97, 11.73, 11.62