5.7 KiB
title, last_updated, sidebar, permalink
| title | last_updated | sidebar | permalink |
|---|---|---|---|
| Hardware And Software Description | 09 April 2021 | merlin6_sidebar | /merlin5/hardware-and-software.html |
Hardware
Computing Nodes
Merlin5 is built from recycled nodes, and hardware will be decomissioned as soon as it fails (due to expired warranty and age of the cluster).
- Merlin5 is based on the HPE c7000 Enclosure solution, with 16 x HPE ProLiant BL460c Gen8 nodes per chassis.
- Connectivity is based on Infiniband ConnectX-3 QDR-40Gbps
- 16 internal ports for intra chassis communication
- 2 connected external ports for inter chassis communication and storage access.
The below table summarizes the hardware setup for the Merlin5 computing nodes:
| Merlin5 CPU Computing Nodes | |||||||
|---|---|---|---|---|---|---|---|
| Chassis | Node | Processor | Sockets | Cores | Threads | Scratch | Memory |
| #0 | merlin-c-[18-30] | Intel Xeon E5-2670 | 2 | 16 | 1 | 50GB | 64GB |
| merlin-c-[31,32] | 128GB | ||||||
| #1 | merlin-c-[33-45] | Intel Xeon E5-2670 | 2 | 16 | 1 | 50GB | 64GB |
| merlin-c-[46,47] | 128GB | ||||||
Login Nodes
The login nodes are part of the Merlin6 HPC cluster,
and are used to compile and to submit jobs to the different Merlin Slurm clusters (merlin5,merlin6,gmerlin6,etc.).
Please refer to the Merlin6 Hardware Documentation for further information.
Storage
The storage is part of the Merlin6 HPC cluster,
and is mounted in all the Slurm clusters (merlin5,merlin6,gmerlin6,etc.).
Please refer to the Merlin6 Hardware Documentation for further information.
Network
Merlin5 cluster connectivity is based on the Infiniband QDR technology. This allows fast access with very low latencies to the data as well as running extremely efficient MPI-based jobs. However, this is an old version of Infiniband which requires older drivers and software can not take advantage of the latest features.
Software
In Merlin5, we try to keep software stack coherency with the main cluster Merlin6.
Due to this, Merlin5 runs:
- RedHat Enterprise Linux 7
- Slurm, we usually try to keep it up to date with the most recent versions.
- GPFS v5
- MLNX_OFED LTS v.4.9-2.2.4.0, which is an old version, but required because ConnectX-3 support has been dropped on newer OFED versions.