Configuring memory-to-memory replication for the client/server function using isolated replicators

Why and when to perform this task

To configure the session management facility for memory-to-memory session replication with replicators separated from the backup servers, complete the following steps:

Steps for this task

  1. Create an application cluster.
    This cluster is used to deploy the application.
    1. Go to the Server Cluster page. Click Servers > Clusters.
    2. Click New.
    3. Type a cluster name for this application cluster.
    4. Click Next.
    5. Define each cluster member server. Type a cluster member name.
    6. Click Apply.
      Complete steps e and f for each server created in this cluster.
    7. Click Next and review the summary of changes.
    8. Click Finish to complete the configuration.
    Do not create a replication domain or replicators on the member server for the application cluster.
  2. Create a cluster of session manager replication servers (backup cluster).
    1. Go to the Server Cluster page. Click Servers > Clusters.
    2. Click New.
    3. Type a cluster name for the session manager of replication servers.
    4. Click Next.
    5. Define each cluster member server. Type a cluster member name.
    6. Define a replicator on each cluster member server. Select the Create replication entry in this server check box.
    7. Click Apply.
      Complete steps e through g for each server created in this cluster.
    8. Click Next and review the summary of changes.
    9. Click Finish to complete the configuration.
    This step creates a cluster of session manager replication servers and creates a replicator on each cluster member server.
  3. Create a replication cluster. The replication cluster defines the replication domain and each of the replicators.
    1. Go to the Server Cluster page. Click Servers > Clusters.
    2. Click New.
    3. Type a replication cluster name.
    4. Define a replication domain. Select the Create Replication Domain for this cluster check box.
    5. Click Next.
    6. Define each replicator. Type a cluster member name.
    7. Select the Create Replication Entry in this Server check box.
    8. Click Apply.
      Complete steps f through h for each server created in this cluster.
    9. Click Next and review the summary of changes.
    10. Click Finish to complete the configuration.
  4. Enable memory-to-memory session replication for each cluster member server in the application cluster and the backup cluster.
    Memory-to-memory session replication does not need enablement in the replication cluster; these servers act as replicators only.
    1. Go to the appropriate level of session management for the Web container level. Click Application Server > application_cluster_member_server or backup_cluster_member_server > Web Container > Session Management.
    2. Click Distributed Environment Settings under Additional Properties.
    3. Click Memory to Memory Replication .
      Verify that each session manager, both the replication clients and the servers, point to a replicator from the replication cluster, distributing them as evenly as possible. Set the application cluster servers as clients and the backup cluster server as a server.
    4. Click Apply.
    5. Repeat these steps for each server. Click OK.
    This step points the servers to the replicator of your choice.
  5. If you want to change the tuning parameters, click Custom Tuning Parameters and select a setting or customize one.

    Note: Using the default tuning parameter custom settings, which specifies time based write interval of 10 seconds, may result in data loss when an application server in your cluster fails. However, this is just a small opportunity for lost data when compared to the significant improvement in performance.

    1. Click Apply.
    2. Click Save.

Related concepts
Memory-to-memory topology: Peer-to-peer function with a local replicator
Memory-to-memory topology: Peer-to-peer function with remote/isolated replicators
Memory-to-memory topology: Client/server function with isolated replicators
Memory-to-memory topology: Client/server function with remote replicators
Related tasks
Configuring memory-to-memory replication for the peer-to-peer function with a local replicator (default memory-to-memory replication)
Configuring memory-to-memory replication for peer-to-peer functions with remote/isolated replicators
Configuring memory-to-memory replication for the client/server function using remote replicators



Searchable topic ID:   tprsconfigcsisolated
Last updated: Jun 21, 2007 9:56:50 PM CDT    WebSphere Application Server for z/OS, Version 5.0.2
http://publib.boulder.ibm.com/infocenter/wasinfo/index.jsp?topic=/com.ibm.websphere.zseries.doc/info/zseries/ae/tprs_config_cs_isolated.html

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