Providing Open Architecture High Availability Solutions

Each of the two system cards has two CompactPCI busses – usually each card drives only one

CompactPCI bus (and half of the I/O cards, but in the event of a system card failure, the remaining

system card can manage both busses and all the I/O cards).

Each individual component that participates in the open HA framework and is used within an HA

cluster must be represented by a standard model defined by the Open HA framework. When the

Open HA framework is first introduced there must be a minimum set of qualified components.

A minimum set of components might include:

• Processor modules and memory (e.g., IA32 and IA64)

• Internal and external disk storage and storage I/O (e.g., IDE, SCSI, FC, and RAID)

• Network I/O cards (e.g., Ethernet, T1/E1, and ATM)

• Removable media (e.g., CD/DVD, DAT tape, and floppy disk)

• Chassis components (e.g., power supplies, fans, and backplanes)

• External fabric switches (e.g., Ethernet, ATM, and InfiniBand)

• Operating systems (e.g., Linux*, Microsoft Windows*, and Unix variants)

• HA middleware (e.g., configuration and fault management)

• Persistent data handling (e.g., HA Database, HA file system, and HA data replication)

• Protocol stacks (TCP/IP, SS7, OSI, etc.).

• Application subsystems and processes

There must also be a set of qualification criteria and procedures for adding new components to the

HA framework.

Figure 10. Redundant CompactPCI Arrangement

System Board

Passive Shared BusPassive Shared Bus

Active/Standby

Cross Connection

I/O or Peripheral Processing Board