Operating Systems: AIX, HP-UX, Linux, Solaris, Windows, z/OS
Configure communication between core groups that are in the same cell
A cell is comprised of one or more processes that each host runtime components. Each cell has one or more named core groups. A core group is a group of processes that are directly accessible to each other and is connected using a local area network (LAN). If core groups that are in the same cell need to share workload management (WLM) information, then configure these core groups to communicate.
Before you begin
Create the core groups for your cell. Configure all of the processes within the core groups, including your servers and clusters. The recommendation is a maximum of 50 WebSphere Application Server Network Deployment related processes such as application servers, node agents, and on demand routers defined in your core group.
About this task
You might configure multiple core groups for a cell in the following scenarios:If you are using WebSphere® Application Server Network Deployment, configure bridge interfaces and core group access points. In WebSphere Virtual Enterprise, this configuration is simplified, because these required elements are automatically configured.
- One or more firewalls exist within a cell. A core group cannot contain members from multiple firewall protection domains.
- A large number of processes in the cell and the core group protocols, such as the View Synchrony Protocol, consume correspondingly large amounts of resources, such as processor resources.
- Core group protocols, such as the Failure Detection Protocol, need tuning or configuring to use values that work best with smaller numbers of core group members.
Procedure
- Add node agents and servers to each core group. Configure at least two node agents for each node group to ensure high availability. When a process starts if core group bridges are not configured, then every product process automatically configures a core group access point for each configured core group. The product assumes that each of the node agents in each core group is a core group bridge. The configuration is modified to make each node agent a core group bridge. You might need to restart the processes again for this configuration to complete.
- Start the node agents. If two or more node agents per core group are running, the core groups can communicate.
Results
Core groups that are in the same cell can communicate and share WLM information.
Related concepts
Overview of request flow prioritization
Related tasks
Configure WebSphere Virtual Enterprise for cross-cell communication
Creating ODRs
Creating a new core group
Manage node agents
Related reference
coregroupsplit.py script