MetaCentrum VO is catch-all virtual organization of the Czech National Grid Organization MetaCentrum NGI. MetaCentrum operates and manages distributed computing infrastructure consisting of computing and storage resources owned by CESNET as well as resources of co-operative academic centres within the Czech Republic. Users registered in MetaCentrum get access to a wide range of application software and utilities free of charge, for example Matlab, Maple, or Gaussian.
For more information please visit documentation.
To acces metacentrum resources you need to log in to any of the frontend machine trough ssh protocol. To view complete list of frontends please see documentation.
To log in, open terminal and type:
ssh [username]@skirit.ics.muni.czFrom WOLF cluster please add -X option:
ssh -X [username]@skirit.ics.muni.czYou will be asked for password. When typing, you will not see any characters appeared for the security reason.
If you log in for the first time, you may be prompted by a query:
The authenticity of host 'skirit.ics.muni.cz (2001:718:ff01:1:216:3eff:fe20:382)' can't be
established. ECDSA key fingerprint is SHA256:Splg9bGTNCeVSLE0E4tB30pcLS80sWuv0ezHrH1p0xE.
Are you sure you want to continue connecting (yes/no)?type “yes” and confirm.
There are several frontends (login nodes) to access the grid. Each frontend has a native home directory on one of the storages. There are several storages (large-capacity harddisc arrays). They are named according to their physical location (a city).
Frontends should be used only for:
Usually no computations is done on the frontend. You need to specify your computing resource requirements first, wait for their allocation and then start computation.
There are three basic commands you can use:
To run a job you have two options: interactive job and batch job. Let’s start with interactive one:
qsub -I -l select=1:ncpus=2:mem=4gb:scratch_local=1gb -l walltime=2:00:00parameter -I means that we are asking for an Interactive job. Parameters -l are for specifying resources.