Legion Overview
Legion Architecture
Node Types
- Login Nodes
- Transfer Node
- Compute Nodes
- (Infrastructure Nodes)
Login Nodes
For:
- Access
- Programming
- File transfers (light)
- Testing (light)
- Visualisation (light)
Accessible via ssh, at legion.rc.ucl.ac.uk, or login0(6-9).external.legion.ucl.ac.uk.
Transfer Node
At login05.external.legion.ucl.ac.uk.
Can transfer data around Legion up to 10⨉ faster than normal login nodes.
Compute Nodes
- only accessible via the scheduler
- intended for all significant non-interactive work
- can also do limited interactive work
- can access external networks
Numbers and Types
| Type | Cores | RAM | Network | Number | Total Cores |
|---|---|---|---|---|---|
| T | 32 | 1.5TB | Ethernet | 6 | 192 |
| U | 16 | 64GB | Infiniband | 160 | 2496 |
| V | 12 | 48GB | Ethernet | 8 | 96+GPU |
| X | 12 | 24GB | Infiniband | 144 | 1728 |
| Y | 12 | 24GB | Ethernet | 108 | 1296 |
| Z | 12 | 48GB | Ethernet | 4 | 48 |
Topology
Filesystem Access
