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12 Chapter 1
Overview
V-Class Server Architecture
With small CTI cache sizes, additional aliasing between memory
locations may occur, reducing the cache hit rate and increasing the
latency for remote accesses. The bold entries in Table 1 show the
minimal CTI cache sizes needed to avoid excessive aliasing.
Table 1 Valid CTI cache sizes
CTI cache memory is configured at system boot time. The CTI cache
memory is dedicated only to be used for encaching remote accesses, and
is not available for any other use, such as use by HP-UX or applications.
Input/Output
A multiple-cabinet V2500/V2600 server can contain up to 112 PCI I/O
cards, with each cabinet containing up to 28 PCI I/O cards. Each V2500/
V2600 cabinet includes 64-bit PCI chassis, eight PCI buses, and
connections for either three or four PCI cards per PCI bus.
The following I/O cards are supported on HP V2500/V2600 servers:
• Tachyon Fibre Channel
• HVD FWD SCSI
• LVD Ultra2 SCSI
• 10/100 Base T Ethernet
• 1000 Base SX Gigabit Ethernet
• FDDI
Node Memory
size
Node CTI Cache
size in MB
4 GB 32, 64, 128, 256, 512, 1024, 2048
8 GB 32, 64, 128, 256, 512, 1024, 2048, 4096
16 GB 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192
24 GB 64, 128, 256, 512, 1024, 2048, 4096, 8192
32 GB 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384