Service Group Dependency Configurations
This section describes the dependency configurations and the actions performed by parent and child groups according to dependency type and location. This section also includes a list of frequently asked questions (FAQs) regarding each dependency.
See Dependencies in Failover and Parallel Service Groups for detailed information about group dependencies in different types of service groups.
Online Local Dependency
In an online local dependency, a child group must be online on a system before a parent service group can come online on the same system.
| Online Local
|
Failover System for Child Group
|
No Failover System for Child Group
|
|---|
Child Fails
|
Soft
|
- Child faults.
- Child fails over to available system.
- Parent fails over to same system as child.
|
- Child faults.
- No failover for parent.
- Parent continues to run on original system.
|
Firm
|
- Child faults.
- Parent taken offline.
- Child fails over and starts.
- Parent starts on system with child.
|
- Child faults.
- Parent taken offline.
- Both groups die.
|
Hard
|
- Child faults.
- Parent is taken offline.
- Child fails over to available system.
- Parent starts on same system as child.
|
- Child faults.
- Parent is taken offline.
|
| Online Local
|
Failover System for Parent Group
|
No Failover System for Parent Group
|
|---|
Parent Fails
|
Soft
|
- Parent faults.
- No failover for parent.
- Child continues to run on original system.
|
- Parent faults.
- No failover for parent.
- Child continues to run on original system.
|
Firm
|
- Parent faults.
- No failover for parent.
- Child continues to run on original system.
|
- Parent faults.
- No failover for parent.
- Child continues to run on original system.
|
Hard
|
- Parent faults.
- Child fails over to available system.
- Parent fails over to same system as child.
|
- Parent faults.
- Child continues to run on original system.
|
FAQ for Online Local Dependency
- Can parent group be brought online when child group is offline? Firm=No Soft=No.
- Can child group be taken offline when parent group is online? Firm=No Soft=No.
- Can parent group be switched while child group is running? Firm=No Soft=No.
- Can child group be switched while parent group is running? Firm=No Soft=No.
|
