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Model: 
Architecture: 
Nodes:  
Processors:
Cores:
RAM: 
Internal Network: 
Peak performance single node: 
Peak Performance: 
+

Accelerators:



Starting from

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March 2021 Galileo

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was turned off to make space for the new more performant

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structure Galileo100.

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The new Infrastructure is co-funded by the European ICEI (Interactive Computing e-Infrastructure) project, it is a system engineered by DELL.


System Architecture

Compute Nodes:

  • 528 computing nodes each 2 x CPU Intel CascadeLake 8260,  with 24 cores each, 2.4 GHz, 384GB RAM, subdivided in:
      •  348 standard nodes ("thin nodes") 480 GB SSD
      • 180 ("fat nodes") 2TB SSD, 3TB Intel Optain
      •  36 GPU nodes with 2x NVIDIA GPU V100 with 100Gbs Infiniband interconnection and 2TB SSD.
  • 77 computing server OpenStack for cloud computing, 2x CPU 8260 Intel CascadeLake, 24 cores, 2.4 GHz, 768 GB RAM, with 100Gbs Ethernet interconnection.
  • 20 PB of active storage accessible from both cloud and HPC nodes.
  • 5 PB of fast storage for HPC system.
  • 1 PB Ceph storage for Cloud (full NVMe/SSD)

The GALILEO supercomputer has been introduced first in January 2015 and in its first configuration, it has been available to the Italian public and industrial researchers until January 2018. It has been the national Tier-1 system for scientific research.

Starting from January 2018 GALILEO has been reconfigured with Intel Xeon E5-2697 v4 (Broadwell) nodes, inherited from MARCONI system. The cluster with this reconfiguration has opened for production in March of the same year.

Starting from August 2019 a new reconfiguration phase led to a new, upgraded environment, equipped with Intel Omni-Path internal network and increasing the number of compute nodes available to 1022 Intel Xeon E5-2697 v4 (Broadwell).

System Architecture

Compute Nodes:

Login and Service nodes:

All the nodes are interconnected through an Infiniband network, with OPA v10.6, capable of a maximum bandwidth of 100Gbit/s between each pair of nodes.

Accounting

For more information about accounting, please consult our dedicated section.

Budget Linearization policy

On GALILEO GALILEO100 a linearization policy for the usage of project budgets has been defined and implemented. For each account, a monthly quota is defined as:

monthTotal = (total_budget / total_no_of_months)

Starting from the first day of each month, the collaborators of any account are allowed to use the quota at full priority. As long as the budget is consumed, the jobs submitted from the account will gradually lose priority, until the monthly budget (monthTotal) is fully consumed. At that moment, their jobs will still be considered for execution, but with a lower priority than the jobs from accounts that still have some monthly quota left.

This policy is similar to those already applied by other important HPC centers in Europe and worldwide. The goal is to improve the response time, giving users the opportunity of using the cpu hours assigned to their project in relation to their actual size (total amount of core-hours).


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