Specifications

Extending Your Hierarchy
input/confirmation, click Accept Defaults.
2. The Pre-Extend Wizard will prompt you to enter the following information.
Note: The first two fields appear only if you initiated the Extend from the Edit menu.
Field Tips
Template
Server
Select the Template Server where your DataKeeper resource hierarchy is
currently in service. It is important to remember that the Template Server you
select now and the Tag to Extend that you select in the next dialog box
represent an in-service (activated) resource hierarchy.
An error message will appear if you select a resource tag that is not in service on
the template server you have selected. The drop down box in this dialog
provides the names of all the servers in your cluster.
Tag to
Extend
This is the name of the DataKeeper instance you wish to extend from the
template server to the target server. The drop down box will list all the resources
that you have created on the template server.
Target
Server
Enter or select the server you are extending to.
Switchback
Type
You must select intelligent switchback. This means that after a failover to the
backup server, an administrator must manually switch the Multi-Site Cluster
hierarchy resource back to the primary server.
CAUTION: This release of DataKeeper for Linux does not support Automatic
Switchback for DataKeeper resources. Additionally, the Automatic Switchback
restriction is applicable for any other LifeKeeper resource that becomes part of
the Multi-Site Cluster hierarchy. This includes anything sitting above the
hierarchy or becomes a child within the hierarchy.
Template
Priority
Select or enter a Template Priority. This is the priority for the DataKeeper
hierarchy on the server where it is currently in service. Any unused priority value
from 1 to 999 is valid, where a lower number means a higher priority (1=highest).
The extend process will reject any priority for this hierarchy that is already in use
by another system. The default value is recommended.
Note: This selection will appear only for the initial extend of the hierarchy.
Target
Priority
Select or enter the Target Priority. This is the priority for the new extended
DataKeeper hierarchy relative to equivalent hierarchies on other servers. Any
unused priority value from 1 to 999 is valid, indicating a server’s priority in the
cascading failover sequence for the resource. A lower number means a higher
priority (1=highest). Note that LifeKeeper assigns the number “1” to the server on
which the hierarchy is created by default. The priorities need not be consecutive,
but no two servers can have the same priority for a given resource.
3. After receiving the message that the pre-extend checks were successful, click Next.
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