HP OpenVMS 8.x manual Preparing to Use OpenVMS Management Station

In a common-environment cluster with one common system disk, you use a common copy of each of these files located in the SYS$COMMON:[SYSEXE] directory on the common system disk, or on a disk that is mounted by all cluster nodes. No further action is required.

However, to prepare a common user environment for an OpenVMS Cluster system that includes more than one common system disk, you must coordinate the files on those disks.

The following rules apply:

•Disks holding common resources must be mounted early in the system startup procedure, such as in the SYLOGICALS.COM procedure.

•You must ensure that the disks are mounted with each cluster reboot.

Follow these steps to coordinate files:

1.Decide where to locate the files. In a cluster with multiple system disks, system management is much easier if the common system files are located on a single disk that is not a system disk.

2.Copy the following files from SYS$COMMON:[SYSEXE] to a directory on a disk other than the system disk:

•TNT$UADB.DAT

•TNT$ACS.DAT

•TNT$MONITOR.DAT

•TNT$MONITOR.TNT$MONITOR_JOURNAL

•TNT$EMERGENCY_MOUNT.COM

•TNT$JOURNAL.TNT$TRANSACTION_JOURNAL

3.Edit the file SYS$COMMON:[SYSMGR]SYLOGICALS.COM on each system disk and define logical names that specify the location of the cluster common files.

Example

To place the files on $1$DJA15, define logical names as follows:

$ DEFINE/SYSTEM/EXEC TNT$ACS -

_$ $1$DJA15:[VMS$COMMON.SYSEXE]TNT$ACS.DAT

TNT$EMERGENCY_MOUNT.COM is created in SYS$SYSTEM or in the directory pointed to by the TNT$ACS logical, if the logical exists.

$ DEFINE/SYSTEM/EXEC TNT$UADB -

_$ $1$DJA15:[VMS$COMMON.SYSEXE]TNT$UADB.DAT

$ DEFINE/SYSTEM/EXEC TNT$JOURNAL -

_$ $1$DJA15:[VMS$COMMON.SYSEXE]TNT$JOURNAL.TNT$TRANSACTION_JOURNAL

$ DEFINE/SYSTEM/EXEC TNT$MONITOR -

_$ $1$DJA15:[VMS$COMMON.SYSEXE]TNT$MONITOR.DAT

$ DEFINE/SYSTEM/EXEC TNT$MONITORJOURNAL -

_$ $1$DJA15:[VMS$COMMON.SYSEXE]TNT$MONITOR.TNT$MONITOR_JOURNAL

4.To ensure that the system disks are mounted correctly with each reboot, follow these steps:

a.Copy the SYS$EXAMPLES:CLU_MOUNT_DISK.COM file to the

[VMS$COMMON.SYSMGR] directory, and edit the file for your configuration.

b.Edit SYLOGICALS.COM and include commands to mount, with the appropriate volume label, the system disk containing the shared files.

Example

If the system disk is $1$DJA16, include the following command:

$ @SYS$SYSDEVICE:[VMS$COMMON.SYSMGR]CLU_MOUNT_DISK.COM - _$ $1$DJA16: volume-label

258 Preparing to Use OpenVMS Management Station