We would like to inform users about several new features in the MetaCentrum & CERIT-SC infrastructures:
It is possible for users to access GUI applications simply through a web browser. For deatiled information see https://wiki.metacentrum.cz/wiki/Remote_desktop#Quick_start_I_-_Run_GUI_desktop_in_a_web_browser.
The access through VNC client (an older and more complicated way to get GUI) remains unchanged - see https://wiki.metacentrum.cz/wiki/Remote_desktop#Quick_start_II_-_Run_GUI_desktop_in_a_VNC_session and following tutorials.
As a new feature users can now fetch data from finished jobs, including those that finished more than 24 hours ago. For this, use command
pbs-get-job-history <job_id>
If the job is found in the archive, the command will create in current dir a new subdirectory called job_ID (e.g. 11808203.meta-pbs.metacentrum.cz) with several files. Namely, there will be
job_ID.SC - a copy of batch script as passed to qsub
job_ID.ER - standard output (STDOUT) of a job
job_ID.OU - standard error output (STDERR) of a job
For detailed information see https://wiki.metacentrum.cz/wiki/PBS_get_job_history
As a new feature users can now specify a minimum amount of memory the GPU card needs to have. For this there is a new PBS parameter gpu_mem. For example, the command
qsub -q gpu -l select=1:ncpus=2:ngpus=1:mem=10gb:scratch_local=10gb:gpu_mem=10gb -l walltime=24:0:0
makes sure that the GPU card on computational node will have at least 10 GB of memory.
For more information see https://wiki.metacentrum.cz/wiki/GPU_clusters.
We would also like to note that it is better to select GPU machine by specifying the gpu_mem and cuda_cap parameters than by specifying a particular cluster. The former way includes wider set of machines and therefore the shortens the queuing time of jobs.