C.3 Prerequisites for the cluster system

1

System configuration

• The system must consist of two or more server machines that share a disk.

• A JP1/DH - Server machine in the cluster must be accessible to clients via a logical IP address, which must be able to be shared between servers.

• The shared disk must be set up with common data. For details about data stored in the shared disk, see C.6 Data stored on the shared disk.

2

Shared disk

• The shared disk must be shared between the active and standby system nodes.

• The shared disk must be under exclusive control so that it cannot be concurrently accessed by multiple servers.

• Data written to files must be consistent and inherited by the standby node during a failover.

• If the shared disk is in use by a process during a failover, the failover must be forced to be completed.

• The shared disk must meet the hardware requirements.

3

Hardware

• The hardware must comply with the hardware requirements for your clustering software.

  For details about the clustering software supported by JP1/DH - Server, see C.2 Supported clustering software.

4

Software

• The software must comply with the software requirements for your clustering software.

• For details about the clustering software supported by JP1/DH - Server, see C.2 Supported clustering software.

5

Setup

• JP1/DH -Server cluster setup instructions must be followed to set up your JP1/DH - Server environment.