When moving members to a different core group, remember that: each
WebSphere process is a member of exactly one core group, all members of a
given cluster must belong to the same core group, and each core group must
contain at least one deployment manager or node agent process.
Before you begin
- Review core group concepts.
- Determine which core group members you want to move, and to which core
group you want to move them
- Stop affected processes using the following guidelines:
About this task
You might need to move one or more core group members:
- To populate a newly created core group.
- To rebalance existing core groups.
To move members between core groups:
Procedure
- In the administrative console, click Servers > Core groups >
Core group settings > core_group_name > Core group servers.
- Select the core group containing the processes that you want to
move to another core group.
- In the Select column, select the servers that you want to move.
If you are populating a new core group, at least one node agent or deployment
manager must be moved to the new core group.
- Click Move. The Core groups > DefaultCoreGroup
> Core group servers > Move administrative console panel is displayed
showing the servers you want to move and the core group to which these servers
currently belong.
- Indicate in the To core group field the core group to which you
want these servers moved.
- Click Apply and then Save.
- Click System administration > Nodes, and then click Synchronize to
synchronize your changes on all running nodes.
- Manually synchronize all stopped nodes by running the syncNode command
from the profile_root/node_agent_profile/bin directory.
- If the deployment manager is moved, restart the deployment manager
process.
- Restart all of the other moved processes.
Results
After the servers complete their restart, all moved servers should
belong to their new core group.
What to do next
- You can verify that the servers are in the correct core groups. For each
core group, in the administrative console, click Servers > Core groups
> Core group settings > core_group_name > Core
group servers and look at the list of core group servers that displays.
- You can set up core group bridges if any of the core groups need to communicate
with each other. See Core group communications using the core group bridge service
for
more information.