4.1.0 HP PolyServe Matrix Server administration guide (T5392-96073, October 2010)

As part of configuring a virtual host, you will need to select network interfaces located
on the servers that can be used for the virtual host. The interfaces are placed in order:
primary, backup #1, backup #2, and so on. The ClusterPulse process considers the
“health” of the servers providing those interfaces when determining where to place
a virtual host. The status and enablement of each monitor contributes to the health
of a server with respect to the virtual host. When a server is completely “healthy,”
all of the services associated with the virtual host are up and enabled.
• AUTOFAILBACK. This is the default policy. It is intended to return the virtual host
to its original configuration, or as close to it as possible. After the virtual host fails
over to a backup server, Matrix Server watches the health of the servers higher
in the list for that virtual host. When the health of one of these servers is equal to
or greater than the backup server where the virtual host currently resides, the
virtual host will automatically attempt to fail over to that server.
• NOFAILBACK. This policy is intended to minimize failovers. The virtual host re-
mains active on the backup server until a “healthier” server becomes available,
at which point the virtual host fails over to that server. (On a “healthier” server,
more of the services associated with the virtual host will be up than on the server
currently hosting the virtual host.)
Network Interfaces: When the “All Servers” box is checked, the virtual host will be
configured on all servers having an interface on the network you select for this virtual
host. When you add another server to the cluster, the virtual host will automatically
be configured on that server. This option can be useful with administrative
applications.
Available:/Members: The Available column lists all network interfaces that are
available for this virtual host. If you are configuring the virtual host on all servers in
the cluster, move the network interface for the primary server to the Members column.
The corresponding network interfaces on the remaining servers will then be moved
to the Members column automatically.
If you are configuring the virtual host only on certain servers, move the appropriate
network interfaces for those servers to the Members column. The first interface you
select will be the primary interface. The other interfaces you select will be backups.
The virtual host now appears on the Management Console. The following view is
from the Virtual Hosts tab.
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