HP OpenVMS 8.x manual OpenVMS Cluster Information You Need, Type of configuration

OpenVMS Version 8.3-1H1 for Integrity Servers New Features and Release Notes and the HP OpenVMS Version 8.3 Release Notes.

For information about supporting the TDC_RT software in OpenVMS Clusters, see Section 7.8.10.5 (page 135).

2.4 OpenVMS Cluster Information You Need

If during the installation you answer YES to the system prompt asking whether your system will be a member of an OpenVMS Cluster, you need to provide the following information after you boot the system disk:

Required Information	Explanation
Type of configuration	Configuration types (CI, DSSI, SCSI, local area, or mixed-interconnect) are
	distinguished by the interconnect device that the VAX, Alpha, or Integrity server
	computers in the OpenVMS Cluster use to communicate with one another. Note
	that HP Integrity servers do not support CI, DSSI, or MEMORY CHANNEL
	devices.

DECnet node name and node address

To obtain the DECnet node name and node address for the computer on which you are installing the OpenVMS operating system, consult the network or system manager. If you install DECnet-Plus for OpenVMS (Phase V) software and do not plan to use DECnet Phase IV for OpenVMS addresses, then you do not need to provide this information.

Allocation class value	During the installation procedure, you might be asked for the allocation class
	value (ALLOCLASS) of the computer on which you are installing the OpenVMS
	operating system. For example:
	Enter a value for this_node ALLOCLASS parameter:

Whether you want a quorum disk

Location of the page and swap files

Systems that will be a MOP server1, disk server, or tape server

Cluster group number and cluster password2

Note that in an OpenVMS Cluster environment, the allocation class value cannot be zero if the node serves DSSI or CI disks to other cluster members, or if volume shadowing will be used on this system or in the cluster. In either case, the ALLOCLASS value must be a number from 1 to 255.

After you enter the allocation class value, the installation procedure uses it to automatically set the value of the ALLOCLASS system parameter.

HP recommends that you thoroughly review the chapter on cluster storage devices in the HP OpenVMS Cluster Systems manual. This manual also includes the rules for specifying allocation class values.

To help you determine whether you need a quorum disk in the cluster, see the HP OpenVMS Cluster Systems manual.

On a nonclustered system, the page and swap files are on one or more local disks, but on a clustered system, the files might be on one or more local or clustered disks. See the HP OpenVMS Cluster Systems manual to help you determine where the page and swap files will be located for the system on which you are installing the OpenVMS operating system software.

If you are going to set up either a local area or a mixed-interconnect cluster, you need to make these determinations.

If you are going to set up a local area or mixed-interconnect cluster that is LAN-based (Gigabit Ethernet), use the following rules to determine the cluster group number and password:

•Cluster group number—A number in the range from 1 to 4095 or 61440 to 65535.

•Cluster password—Must be from 1 to 31 alphanumeric characters in length and can include dollar signs ($) and underscores(_).

1Servers that use the Maintenance Operations Protocol (MOP).

2Cluster group number and password are required by any cluster nodes that use the local area network for cluster communications. In a cluster that uses mixed interconnects, if any of the interconnects require the cluster number and password, then you must set the cluster number and password for all nodes.

2.4 OpenVMS Cluster Information You Need 47