Before you begin, determine these conditions:
- Whether the cluster installation will
support a shared (NFS) or a private installation.
- Whether the cluster will use LDAP (recommended for
private installations) or interfaces files for server lookup information.
- Will the cluster support Java in the database via
a third-party JVM?
- Whether the cluster will support a Veritas Cluster
Server (VCS) for managing application servers in the clustered environment.
- Whether the cluster will use a single or multiple
Backup Servers.
- The location of the $SYBASE installation
directory. If this is to be a private installation, you must provide
a separate $SYBASE installation directory for
each instance.
- The cluster name.
- The number of instances and the instance names.
- The Domain Name Service for the network on which
the cluster will run. The Unified Agent and the sybcluster utility
will not function properly if the DNS entries are not entered correctly
for each node.
- The number of agents in the cluster. Sybase recommends
that you use one node for each of the instances in the cluster with
two or more engines per instance.
- The raw devices to be used by each database device.
For the Cluster Edition, you must create all devices, database devices,
and quorum devices as raw devices on shared disks.
Local user temporary databases do not require shared storage
and can use local file systems created as private devices. However,
local system temporary databases you create during the cluster configuration
can use only shared disks. See Chapter 8, “Using Temporary
Databases” of the Cluster User Guide for
additional information on using local disks for temporary data.
- The range of port numbers used by each instance
to exchange messages with other instances via the private interconnection.
Choose unique port numbers that are not in use by other applications.
Note:
The Adaptive Server plug-in and sybcluster supply
default values if your system does not have an existing standard.
- The query or listening port number for each instance.
Choose unique port numbers that are not in use by other applications.
- The IP addresses or network names of the private
primary and secondary network cards on each node. Only UDP network
protocol is supported at this time.