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<a href="https://www.hpc.cineca.it/?nltr=MTA5Ozk7aHR0cHM6Ly93d3cuaHBjLmNpbmVjYS5pdC9uZXdzbGV0dGVyL2xlb25hcmRvLW5ldy1qb2ItbG9jYWwtc3RvcmFnZS1yZXNvdXJjZS1tYW5hZ2VtZW50Lzs7YzhjMjk4ZDcwZjFhNmJhMTdkMjZkOTg4NWEzZDE4MWM%3D" style="font-size: 32px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: normal; margin: 0; text-decoration: none;" class="tnpc-inline-editable" data-type="title" data-id="19691" dir="ltr">LEONARDO: new job local storage resource management</a> </td>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">Dear Users,</p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">As on the other CINECA clusters, also on LEONARDO a temporary storage area <strong>local to nodes</strong> is available for the job's execution, accessible via the environment variable <strong>$TMPDIR</strong>.</p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">Differently from the other CINECA clusters, on LEONARDO the temporary area of a job is managed by the slurm job_container/tmpfs plugin, which provides a job-specific, private temporary file system space, with a private instance of /tmp (and /dev/shm) in the job's user space. Such tmpfs are removed at the end of the job (and all data will be lost). Please note that, thanks to this plugin: </p>
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<li style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: normal!important;">the local storage is considered a "resource" on LEONARDO, and can be explicitly asked <strong>on the diskful nodes only</strong> (DCGP and serial nodes) via the sbatch directive or srun option "--gres=tmpfs:XX" (for instance --gres=tmpfs=200GB). If not requested, the /tmp has the default dimension of 10 GB</li>
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<li style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: normal!important;">on the booster (<strong>diskless</strong>) partition the gres/tmpfs <strong>cannot</strong> be requested, and the /tmp area is created with a fixed quota of 10GB </li>
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<li style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: normal!important;">the requested amount of gres/tmpfs resource <strong>contributes to the consumed budget</strong>, changing the number of accounted equivalent core hours, see the <a href="https://www.hpc.cineca.it/?nltr=MTA5Ozk7aHR0cHM6Ly93aWtpLnUtZ292Lml0L2NvbmZsdWVuY2UvZGlzcGxheS9TQ0FJVVMvVUcyLjQlM0ErQWNjb3VudGluZyNVRzIuNDpBY2NvdW50aW5nLSUyMk5vbi1leGNsdXNpdmUlMjJub2RlczpUTVBESVJtYXR0ZXJzKExFT05BUkRPb25seSkhOzs1N2Q4NTI2YjYwMDgyODZkMjg4NzgxY2FiNzQ1YzVkZg%3D%3D">dedicated section</a> on the Accounting on CINECA clusters. The accounting of this new resource will be active starting from tomorrow. </li>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">For more details, please refer to the <a href="https://www.hpc.cineca.it/?nltr=MTA5Ozk7aHR0cHM6Ly93aWtpLnUtZ292Lml0L2NvbmZsdWVuY2UvZGlzcGxheS9TQ0FJVVMvVUczLjIlM0ErTEVPTkFSRE8rVXNlckd1aWRlI1VHMy4yOkxFT05BUkRPVXNlckd1aWRlLURpc2tzYW5kRmlsZXN5c3RlbXM7O2Q3MmFhYmEwZTIwYTZmNWI2NDNmZjM3MTMzYzEzM2E2" data-type="link" data-id="https://wiki.u-gov.it/confluence/display/SCAIUS/UG3.2%3A+LEONARDO+UserGuide#UG3.2:LEONARDOUserGuide-DisksandFilesystems">Disks and Filesystems</a> section on Leonardo's User Guide. </p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">Best regards, </p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">HPC User Support @ CINECA</p>
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