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Connection on the front end
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## Connection on the front end
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Access to the front end is done via an ssh connection:
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Access to the front end is done via an ssh connection:
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$ ssh login@jean-zay.idris.fr
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$ ssh login@liger.ec-nantes.fr
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The resources of this interactive node are shared between all the connected users:
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The resources of this interactive node are shared between all the connected users:
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As a result, the interactive on the front end is reserved exclusively for compilation and script development.
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Important: The Jean Zay front end nodes are not equipped with GPU. Therefore, these nodes cannot be used for executions requiring one or more GPU.
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**For a reminder** the interactive on the front end is reserved exclusively for compilation and script development. The Liger front end nodes are not equipped with GPU. Therefore, these nodes cannot be used for executions requiring one or more GPU.
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To effectuate interactive executions of your GPU codes on the accelerated compute nodes, you must use one of the following two commands:
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To effectuate interactive executions of your GPU codes on compute nodes with GPUs like `turing01` and all viz nodes `viz[01-14]`, you must use one of the following two commands:
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The srun command:
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- The `srun` command:
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to obtain a terminal on a GPU compute node within which you can execute your code,
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- to obtain a terminal on a GPU compute node within which you can execute your code,
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or to directly execute your code on the GPU partition.
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- or to directly execute your code on the GPU partition.
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The salloc command to reserve GPU resources which allows you to do more than one execution consecutively.
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- The `salloc` command to reserve GPU resources which allows you to do more than one execution consecutively.
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However, if the computations require a large amount of GPU resources (in number of cores, memory, or elapsed time), it is necessary to submit a batch job. |
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However, if the computations require a large amount of GPU resources (in number of cores, memory, or elapsed time), it is necessary to submit a batch job. |
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