Nova

Originally Nova cluster consisted of compute nodes with multicore Intel Skylake Xeon processors, 1.5TB or 11TB of fast NVME local storage and 192GB / 384GB / 3TB of memory. Five of those nodes also have one or two Nvidia Tesla V100-32GB GPU cards. In 2021 the cluster has been expanded with AMD nodes, each having two 32-Core AMD EPYC 7502 Processors, 1.5TB of fast NVME local storage and 512GB of memory. The new GPU nodes in addition have four NVidia A100 80GB GPU cards. The 2022 expansion consists of 54 regular compute nodes (with two 32-Core Intel 8358 processors, 1.6TB of local storage and 512GB of memory each) and 5 GPU nodes with two 24-Core AMD EPYC 7413 processors, eight A100 GPU cards, 960GB of local storage and 512GB of memory each.

The three service nodes include login node, data transfer node and the management node.

Large shared storage consists of six file servers and twelve JBODS configured to provide either 338TB of backed up storage or 457TB non-backed up storage per server. Later 5 more file servers have been added.

All nodes and storage are connected via Mellanox EDR (100Gbps) switch.

Some of the above equipment is used for education in special class partitions - 7 regular nodes and 3 GPU nodes are dedicated for classes, while 28 regular nodes are shared between class-short and long_512 partitions.

Detailed Hardware Specification

Number of Nodes	Processors per Node	Cores per Node	Memory per Node	Interconnect	Local $TMPDIR Disk	Accelerator Card	CPU-Hour Cost Factor
72	Two 18-Core Intel Skylake 6140	36	192 GB	100G IB	1.5 TB	N/A	1.0
40	Two 18-Core Intel Skylake 6140	36	384 GB	100G IB	1.5 TB	N/A	1.2
28	Two 24-Core Intel Skylake 8260	48	384 GB	100G IB	1.5 TB	N/A	1.2
2	Two 18-Core Intel Skylake 6140	36	192 GB	100G IB	1.5 TB	2x NVIDIA Tesla V100-32GB	2.7
1	Two 18-Core Intel Skylake 6140	36	192 GB	100G IB	1.5 TB	one NVIDIA Tesla V100-32GB	2.7
2	Two 18-Core Intel Skylake 6140	36	384 GB	100G IB	1.5 TB	2x NVIDIA Tesla V100-32GB	3.0
1	Four 16-Core Intel 6130	64	3 TB	100G IB	11 TB	N/A	6.2
2	Four 24-Core Intel 8260	96	3 TB	100G IB	1.5 TB	N/A	3.0
40	Two 32-Core AMD EPYC 7502	64	512 GB	100G IB	1.5 TB	N/A
15	Two 32-Core AMD EPYC 7502	64	512 GB	100G IB	1.5 TB	four NVidia A100 80GB
54	Two 32-Core Intel Icelake 8358	64	512GB	100G IB	1.6TB	N/A
5	Two 24-Core AMD EPYC 7413	48	512GB	100G IB	960GB	eight NVidia A100 80GB

HPC group schedules regular maintenances every 3 months to update system software and to perform other tasks that require a downtime.

The date of the next maintenance is listed in the message of the day displayed at login (when ssh-ing to the cluster).

Note: Queued jobs will not start if they cannot complete before the maintenance begins. In the output of the squeue command the reason for those jobs will state (ReqNodeNotAvail, Reserved for maintenance) . The jobs will start after the scheduled outage completes.