For a large cell, multiple coordinators are recommended.
Before you begin
The high availability manager, by default, uses the original or
base 6.0.0 protocol version. Before you upgrade to a newer protocol version,
you should make sure that:
Before you change the version of the core
group protocol for a particular core group member, make sure that:
- You are familiar with the content of the "Core group protocol versions"
topic.
- All core group members with which the new version is associated can support
that version. Each member of the core group must be running at a WebSphere
Application Server code level (VRM) that is equal to or greater than the new
protocol version.
About this task
The high availability manager can use any supported core group
protocol versions. However, to ensure that proper communication continues
between all core group members, you must make sure that all member of a particular
core group use the same version of a core group protocol.
To change
the version of a core group protocol:
Procedure
- In the administrative console, click Servers > Core groups >
Core group settings and select an existing core group.
- Under Additional Properties, click Custom Properties.
- Change the value specified for the IBM_CS_WIRE_FORMAT_VERSION custom
property.
If the IBM_CS_WIRE_FORMAT_VERSION property already
exists, click on the property name, and specify the appropriate version ID
in the Value field.
If this property does not already exist, click New and
then specify IBM_CS_WIRE_FORMAT_VERSION in the Name field
and the appropriate version ID in the Value field.
The following table
lists the supported core group protocol version IDs:
Protocol version ID |
Description |
6.0.0 |
This is the original or base version. All versions
of the high availability manager can use this protocol. If you do not specify
a particular protocol version the high availability manager uses this version. |
6.0.2.9 |
This version was included in the Version 6.0.2.9 service
pack to facilitate core group bridge scalability. This version is recommended
for large topologies that contain multiple core groups and core group bridges
as part of their configuration. |
6.1.0 |
This version was included in Version 6.1 to add core
group scalability improvements, and more support for large topologies. |
- Click OK, and then click Save to
save your changes.
- Select Synchronize changes with nodes,
and then click Save again.
Results
Your changes take effect immediately after synchronization completes.
The members of the core group pick up these changes dynamically.