Computing System's Scalability and upgradability
HERA-B Bologna
Computing System
Computing System's
Scalability and Upgradability
HERA-B Bologna Computing System is widely scalable and
upgradable.
- As the computing demand increases, other CPUs (now in number of
3) may be added to the
K250 server (up to 6, all working in
SMP):
- the load balancing mechanism distributes system load among all the
CPUs, and
- the High level Optimizer (HLO) may allows a
program to use all the CPUs in parallel.
- The 960 Mbytes/s (peak)
processor bus, together with
- single-level, full processor speed 1 MByte
instruction cache and 1 MByte data cache, allows data to flow from CPUs and
memory and viceversa
without bottleneck.
- RAM (now 384 MByte) may be added up to
8 GByte,
- and Hard Disk Drives (now 20 GByte) up to
35.5 TByte on Fast & Wide
SCSI bus
(with 128 MByte/s aggregate I/O throughput).
- If the computing demand further increases, the System may be
upgraded from PA-RISC 8000 64 bit CPUs
(10.8 SPECint95, 18.8 SPECfp95 per CPU)
to PA-RISC 8200
(14.4 SPECint95, 22.0 SPECfp95 per CPU)
and then to
PA-RISC 8500.
- As the workplase demand increase, X-terminals (now in number of
14) may be added to the
System.
| Power |
|---|
|
now |
tomorrow |
after |
| CPU type |
PA-RISC 8000 |
PA-RISC 8200 |
PA-RISC 8500 |
| CPU # |
3 |
< 6 |
? |
| SPECint95 |
32.4 |
< 86.4 |
? |
| SPECfp95 |
56.4 |
< 112.8 |
? |
| RAM |
384 MByte |
< 8 GByte |
? |
| Hard Disk |
20 GByte |
< 35.5 TByte |
? |
(cfr.: Alphastation 500/500: 15.0 SPECint95, 20.4 SPECfp95
Pentium II 266: 10.8 SPECint95, 6.89 SPECfp95
Pentium 100: 3.16 SPECint95, 2.75 SPECfp95)
|
| Workplaces |
|---|
| now |
tomorrow |
| 13 X-terminals |
? X-terminals |
HERA-B Bologna Home Page
February 23, 1996 Domenico Galli