System Architecture

Hardware Description

Hydro includes 2 login nodes and 68 compute nodes.

Login Nodes

  • Number of nodes: 2

  • Dell PowerEdge R720

  • Dual Socket (2) Intel Xeon CPU E5-2690 (8 core, SandyBridge) @ 2.90GHz 20MB Cache (16 cores per node) (HT disabled)

  • 384 GB of memory

Compute Nodes

Dell PowerEdge R720 Compute Node Specifications [2.90GHz]

  • Number of nodes: 28

  • Dual Socket (2) Intel Xeon CPU E5-2690 (8 core, SandyBridge) @ 2.90GHz (16 cores per node) (HT disabled)

  • 384 GB of memory

  • Cache L1/L2/L3: 32/256/20480 KB; L3 Total: 20 MB

  • NUMA domains: 1 per socket, 2 per node

  • CPUs per NUMA: domain0={0,2,4,6,8,10,12,14}, domain1={1,3,5,7,9,11,13,15}

  • 40 Gb/s Ethernet

  • FDR 56Gb/s InfiniBand

Dell PowerEdge R720 Compute Node Specifications [2.0GHz]

  • Number of nodes: 27

  • Dual Socket (2) Intel Xeon CPU E5-2690 (8 core, SandyBridge) @ 2.0GHz (16 cores per node) (HT disabled)

  • 384 GB of memory

  • Cache L1/L2/L3: 32/256/20480 KB; L3 Total: 20 MB

  • NUMA domains: 1 per socket, 2 per node

  • CPUs per NUMA: domain0={0,2,4,6,8,10,12,14}, domain1={1,3,5,7,9,11,13,15}

  • 40 Gb/s Ethernet

  • FDR 56Gb/s InfiniBand

Dell PowerEdge R815 Compute Node Specifications

  • Number of nodes: 4

  • Quad Socket (4) (16 core, AMD Interlagos) @ 2.30GHz (64 cores per node)

  • 512 GB of memory

  • Cache L1/L2/L3: .768/16/16 MB; L3 Total: 32 MB

  • NUMA domains: 2 per socket, 8 per node

  • CPUs per NUMA: domain0={0-7} domain1={8-15} domain2={32-39} domain3={40-47} domain4={48-55} domain5={56-63} domain6={16-23} domain7={24-31}

  • 40 Gb/s Ethernet

  • QDR 40 Gb/s InfiniBand

Dell PowerEdge R7525 Compute Node Specifications

  • Number of nodes: 7

  • Dual Socket (2) AMD EPYC CPU 7452 (32 core, Rome) @ 2.35GHz (64 cores per node) (SMT disabled)

  • 256 GB of memory

  • Cache L1/L2/L3: 32/512/16384 KB; L3 Total: 128 MB

  • NUMA domains: 1 per socket, 2 per node

  • CPUs per NUMA: domain0={0-31}, domain1={32-63}

  • 100 Gb/s Ethernet

  • FDR 56Gb/s InfiniBand

  • 2 NVIDIA A100 80GB PCIe GPUs

Dell PowerEdge R7525 Compute Node Specifications

  • Number of nodes: 2

  • Dual Socket (2) AMD EPYC CPU 7453 (28 core, Milan) @ 2.75GHz (56 cores per node) (SMT disabled)

  • 256 GB of memory

  • Cache L1/L2/L3: 32/512/16384 KB; L3 Total: 64 MB

  • NUMA domains: 1 per socket, 2 per node

  • CPUs per NUMA: domain0={0-27}, domain1={28-55}

  • 100 Gb/s Ethernet

  • FDR 56Gb/s InfiniBand

  • 2 NVIDIA A100 80GB PCIe GPUs

Storage and File Systems

Hydro Storage and File Systems

File System

Media Type

Total Size

Default Quota

Backups

Home (/u)

HDD

2PB

1 TB, 6M files

None

Projects (/projects)

HDD

2PB

50 TB, 1M files

None

Taiga (/taiga)

HDD, NVME cache

>19PB

must be purchased

snapshots

Home

The home (/u) area of the file system is where users land upon logging into the cluster via SSH. Home is Lustre mount type with fixed size file striping. Example uses for home are scripts, source code, and compiling.

Home Directory Permissions

By default, user home directories and /projects directories are closed (permissions 700) with a parent directory setting that prevents users from opening the permissions (see File and Directory Access Control List (ACL)).

Projects

The projects (/projects) area is where a group’s storage capacity resides. Projects is Lustre mount type with fixed size file striping. The projects file system is designed as common space for your group. Projects is also the best place for job input and output.

Taiga

If a Taiga allocation has been purchased, it can be accessed on any hydro node under (/taiga) . It is a Lustre mount type with progressive layout file striping. Taiga can be used to share data across NCSA resources.