High availability environments

 

+

Search Tips   |   Advanced Search

 

Overview

The high availability manager fails over the transactions and work of failed appservers within a core group. Core groups cannot extend beyond the boundaries of a cell and cannot overlap with other core groups. A cluster must be a member of only one core group. All cluster members must be members of that core group.

The default core group is DefaultCoreGroup and is generally sufficient for operation. Unless absolutely required, do not add core groups and do not change the default core group configuration.

Set up high availability environments

1. Enable the HA manager.
2. Create a new policy and associate it with an HA group.
3. Set the policy associated with an HA group.
4. Create a new core group.
5. The servers that designated as preferred coordinators.
6. The number of core group coordinators.
7. Set discovery protocol
8. Set failure detection protocol
9. Configure replication settings
10. Set a transport
    • Set core group IP caching.
    • Set socket buffers
11. Specify a core group when you add a node.
12. Specify a core group when creating an appserver.
13. Set up a core group bridge.
14. Troubleshooting tips

To configure a resource adapter

To configure a resource adapter for HA...

Resources | Resource adapters | Resource adapters | adapter_name | Advanced resource adapter properties | Register this resource adapter with the HA manager | type_of_failover_process

To set using wsadmin...

J2CResourceAdapter EnableHASupport

The HA manager adds the resource adapter to an HA group and determines when that resource adapter is started.

Related

High availability manager
Disable or enable a HA manager
View HA group information
Create a policy for a HA group
Select the policy for a HA group
Create a new core group (HA domain)
View the core groups in a cell
Move core group members
Set core group preferred coordinators
Change the number of core group coordinators
Set the default Discovery Protocol for a core group
Set the default Failure Detection Protocol for a core group
Select the version of a core group protocol
Set core group memory utilization
Set a core group transport
Set core group IP caching
Set core group socket buffers
Specify a core group when adding a node
Specify a core group when creating an appserver
View core group members
Set up IP addresses for HA manager communications
Specify a preferred server for messaging requests
Set the core group bridge service