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System Architecture
Compute Nodes: There are currently 352 1022 36-core compute nodes. Each one contains 2 18-cores Intel Xeon E5-2697 v4 (Broadwell) at 2.30 GHz. All the compute nodes have 128 GB of memory. Of these compute nodes, 36 60 are equipped with nVidia K80 GPU and two with nVidia V100.
Login and Service nodes: There are 8 Login & Viz nodes available (5 are academic nodes and 3 are for industrial users). There are 8 service nodes for I/O and cluster management.
All the nodes are interconnected through an Infiniband network, with OPA v10.7, capable of a maximum bandwidth of 100Gbit/s between each pair of nodes.
Accounting
For more informations about accounting, please consult our dedicated section.
Budget Linearization policy
On GALILEO 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 of their actual size (total amount of core-hours).
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