Hardware
Description of the hardware in Lucidor.
Lucidor is a distributed memory computer (a cluster) from HP. It consists of 106 HP rx5670 servers each with four 1.3 GHz Itanium 2 "McKinley" processors. 22 of the nodes have 48 GB of main memory and the rest have 32GB.
The interconnect is Myrinet. All nodes have a Myricom M3F-PCIXD-2 card (64-bit wide 133 MHz PCI-X.) All cards are connected to a Myrinet-2000 M3-E128 switch populated with 112 ports. Each card/port has a data rate of 2+2 Gbit/s, all through 50/125 multi-mode fiber.
Machine configuration
| Number of nodes |
GHz | CPU type |
Peak GFlop/s |
RAM (GB) |
Disk (GB) |
Scratch (GB) |
Nick- name |
|---|---|---|---|---|---|---|---|
| 22 | 1.3 | McKinley | n/a | 48 | 76 | n/a | H |
| 64 | 1.3 | McKinley | n/a | 32 | 76 | n/a | H |
| Total | |||||||
| 106 | n/a | 3104 | n/a | ||||
In addition to local disk there is plenty of space in the distributed file systems for user home catalogues, source codes, application codes et cetera, as well as a mass storage
system for long-term storage of large data sets.
Some performance and cache size numbers
| Node type (nickname) | B | unit |
|---|---|---|
| Processor | McKinley | |
| Processors per node | 4 | |
| Memory Bandwidth | 6.4 | GByte/sec |
| Local Disk I/O Bandwidth | n/a | MByte/sec (measured writes) |
| Network Adapter Peak Bandwidth (unidirectional) | n/a | MByte/sec |
| Network Adapter Peak Bandwidth (bidirectional) | n/a | MByte/sec |
| Network Latency | n/a | microseconds (measured) |
| L1 Inst Cache | n/a | Kilobytes |
| L1 Data Cache | n/a | Kilobytes (bypassed for floating point) |
| L1 Data Cache Line | n/a | Bytes |
| L1 Data Cache Associativity | n/a | Ways |
| L2 Cache | n/a | Kilobytes |
| L2 Cache Line | n/a | Bytes |
| L2 Cache Associativity | n/a | Ways |
| L3 Cache | n/a | Megabytes |
| L3 Cache Line | n/a | Bytes |
| L3 Cache Associativity | n/a | Ways |
