Overview

ElGato

During the quarterly maintenance cycle on April 27, 2022 the ElGato K20s were removed because they are no longer supported by Nvidia.

Implemented at the start of 2014, ElGato has been reprovisioned with CentOS 7 and new compilers and libraries. From July 2021 it has been using Slurm for job submission. ElGato is our smallest cluster with 130 standard nodes each with 16 CPUs. Purchased by an NSF MRI grant by researchers in Astronomy and SISTA.

Ocelote

Implemented in the middle of 2016, Ocelote is designed to support the majority of workloads on the standard nodes. Additionally, Ocelote has one large memory node with 2TB of memory and 46 nodes with Nvidia P100 GPUs for GPU-accelerated workflows

Puma

Implemented in 2020, Puma is the biggest cat yet. Similar to Ocelote, it has standard CPU nodes (with 94 cores and 512 GB of memory per node), GPU nodes (with Nvidia V100) and two high-memory nodes (3 TB). Local scratch storage increased to ~1.4 TB. Puma runs on CentOS 7.

Contents

Free vs. Buy-In

The HPC resources at UArizona are differentiated from many other universities in that there is central funding for a significant portion of the available resources. Each PI receives a standard monthly allocation of hours at no charge. There is no charge to the allocation for windfall usage and that has proven to be very valuable for researchers with substantial compute requirements.

Research groups can 'Buy-In' (adding additional compute nodes) to the base HPC systems as funding becomes available. Buy-In research groups will have highest priority on the resources they add to the system. If the expansion resources are not fully utilized by the Buy-In group they will be made available to all users as windfall.

Compute System Details

During the quarterly maintenance cycle on April 27, 2022 the ElGato K20s and Ocelote K80s were removed because they are no longer supported by Nvidia.

Name	El Gato	Ocelote	Puma
Model	IBM System X iDataPlex dx360 M4	Lenovo NeXtScale nx360 M5	Penguin Altus XE2242
Year Purchased	2013	2016 (2018 P100 nodes)	2020
Node Count	131	400	236 CPU-only 8 GPU 2 High-memory
Total System Memory (TB)	26TB	82.6TB	128TB
Processors	2x Xeon E5-2650v2 8-core (Ivy Bridge)	2x Xeon E5-2695v3 14-core (Haswell) 2x Xeon E5-2695v4 14-core (Broadwell) 4x Xeon E7-4850v2 12-core (Ivy Bridge)	2x AMD EPYC 7642 48-core (Rome)
Cores / Node (schedulable)	16c	28c (48c - High-memory node)	94c
Total Cores	2160*	11528*	23616*
Processor Speed	2.66GHz	2.3GHz (2.4GHz - Broadwell CPUs)	2.4GHz
Memory / Node	256GB - GPU nodes 64GB - CPU-only nodes	192GB (2TB - High-memory node)	512GB (3TB - High-memory nodes)
Accelerators		46 NVIDIA P100 (16GB)	29 NVIDIA V100S
/tmp	~840 GB spinning /tmp is part of root filesystem	~840 GB spinning /tmp is part of root filesystem	~1440 TB NVMe /tmp
HPL Rmax (TFlop/s)	46	382
OS	Centos 7	CentOS 7	CentOS 7
Interconnect	FDR Inifinband	FDR Infiniband for node-node 10 Gb Ethernet node-storage	1x 25Gb/s Ethernet RDMA (RoCEv2) 1x 25Gb/s Ethernet to storage
* Includes high-memory and GPU node CPU

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