System requirements for the HULFT Clustering function

(1) Environment Requirements

The HULFT Clustering function works on clustering software that manages a failover clustering system.

To configure the clustering system, the following additional hardware is required:

  • A disk array device that can connect to both nodes and can be used as a disk

  • A LAN (for heartbeat) that can connect to both nodes for mutual monitoring, and additional hardware such as LAN cards

The clustering software must work properly in the hardware environment that the clustering software supports.

Figure 3.1 Example Clustering Environment Configuration

Note

Do not use an NFS-mounted disk with HULFT. Use a disk that is mounted locally.

In addition, the IP address resource, the host name resource, and the shared disk resource must meet all of the following conditions:

  • Set as a single group on the clustering software

  • Can be referenced by each node on which HULFT operates

  • Can be used by each node on which HULFT operates

 

The exact name differs depending on the clustering software. If you operate HULFT in bidirectional standby configuration, the following resources must be set for each group:

  • Virtual IP address

  • Virtual host name

  • Shared disk or mirror disk

(2) Operational Configurations

The HULFT Clustering function is capable of operating in both the unidirectional standby configuration (ACTIVE-STANDBY) and the bidirectional standby configuration (ACTIVE-ACTIVE) on a failover clustering system and operates in both the ACTIVE server and the STANDBY server.

For unidirectional standby configurations, a single instance of HULFT operates in the clustering system.

For bidirectional standby configurations, multiple instances of HULFT operate in the clustering system and the failover group for each instance must be registered as a separate service in the clustering software. Multiple instances of HULFT operate on a single node.