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contains up to eight linecards. The Memory Channel adapter in each
system in the cluster is connected to the Memory Channel hub.
One or two Memory Channel adapters can be used with TruCluster
Server. When dual Memory Channel adapters are installed, if the
Memory Channel adapter being used for cluster communication fails, the
communication will fail over to the other Memory Channel.
1.3 Memory Requirements
Cluster members require a minimum of 128 MB of memory.
1.4 Minimum Disk Requirements
This section provides an overview of the minimum file system or disk
requirements for a two-node cluster. For more information on the amount
of space required for each required cluster file system, see the TruCluster
Server
Software Installation manual.
1.4.1 Disks Needed for Installation
You need to allocate disks for the following uses:
• One or more disks to hold the Tru64 UNIX operating system. The disk(s)
are either private disk(s) on the system that will become the first cluster
member, or disk(s) on a shared bus that the system can access.
• One or more disks on a shared SCSI bus to hold the clusterwide root (
/),
/usr, and /var AdvFS file systems.
• One disk per member, normally on a shared SCSI bus, to hold member
boot partitions.
• Optionally, one disk on a shared SCSI bus to act as the quorum disk. See
Section 1.4.1.4, and for a more detailed discussion of the quorum disk,
see the TruCluster Server Cluster Administration manual.
The following sections provide more information about these disks.
Figure 1–1 shows a generic two-member cluster with the required file
systems.
1.4.1.1 Tru64 UNIX Operating System Disk
The Tru64 UNIX operating system is installed using AdvFS file systems on
one or more disks on the system that will become the first cluster member.
For example:
dsk0a root_domain#root
dsk0g usr_domain#usr
dsk0h var_domain#var
Introduction 1–3