View Dependency Properties

Use this page to view properties of the dependency that you selected to view from those dependencies that are defined for the cluster.

Dependencies between resource groups allow complex clusters that use multi-tiered applications to be managed predictably and reliably. There are five different types of dependencies that can be defined among resource groups within a cluster: What properties you can view depend on the type of dependency that you select from those dependencies that are defined for the cluster.

Parent-Child Fields

In this type of dependency, during resource group acquisition, the parent resource group on a node is acquired before the children resource groups are acquired. During resource group release, children resource groups are released before the parent resource group is released. The parent resource group must be online on any node in the cluster before children (dependent) resource groups can be activated on a node.

Associated resource groups
Displays all resource groups that are defined for the selected dependency.
Parent resource group
Displays the name of the parent resource group that provides services upon which a one or more child resource groups depend.
Child resource group
Displays the name of the child resource groups that depend on services that the parent resource group provides.

Start After Fields

In this type of dependency, during resource group acquisition, the target resource group on a node is acquired before the dependent resource group is acquired. The target resource group must be online on any node in the cluster before the dependent resource group can be activated on a node.

Associated resource groups
Displays all resource groups that are defined for the selected dependency.
Target Resource Group
Displays the name of the target resource group that provides services upon which another resource group depends.
Resource group to start after the target resource group
Displays the name of the resource group that is to start after the target resource group starts.

Stop After Fields

In this type of dependency, during resource group release, the target resource group on a node is released before the dependent resource group is released.

Associated resource groups
Displays all resource groups that are defined for the selected dependency.
Target Resource Group
Displays the name of the target resource group that provides services upon which another resource group depends.
Resource groups to stop after the target resource group
Displays the name of the resource group that is to stop after the target resource group stops.

Online on Same Node Fields

In this type of dependency, a set of two or more resource groups are acquired and brought online on the same node according to the startup policy and the availability of the node required. On fallback and fallover, the set of resource groups are processed simultaneously and brought online on the same target node using the fallover and fallback policy defined for these groups.

Associated resource groups
Displays all resource groups that are defined for the selected dependency.
Resource groups to be online in the same node
Displays the names of the resource groups to be acquired and brought online on the same node.

Online on Different Nodes Fields

In this type of dependency, sets of resource groups are assigned High, Medium, and Low priority values, which are used in case there is contention for a given node at any point in time. Higher priority resource groups take precedence over lower priority groups at startup, fallover, and fallback. Each resource group in a set must have a different home node for startup. Only one Online On Different Nodes Dependency set is allowed per cluster.

Associated resource groups
Displays all resource groups that are defined for the selected dependency.
High priority resource groups
Displays the names of the resource groups, in priority order, that are to be acquired and brought online before lower priority resource groups.
Medium priority
Displays the names of the resource groups that are to be acquired and brought online after the high priority resource groups and before low priority resource groups are brought online.
Selected low priority
Displays the names of the resource groups that are to be acquired and brought online after any higher priority or medium priority resource groups are brought online