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Figure 5-7 View from active server

Figure 5-8 is a portion from the console server log which confirms that an active - standby

server configuration is successfully established.

Figure 5-8 Console log protocol confirms the new active - standby server configuration

As Figure 5-7 indicates you may either remove the standby server simply by clicking on the

Remove Standby button. To switch the active server function from the currently active server

to the standby server you simply click the Take over button.

5.1.2 Take over from standby TPC for Replication server

Assume that the active server is no longer available. Then you need to login into the standby

server as shown in Figure 5-9 on page 91. Note that there is no real high server availability

function with an automated failover capability. You need to login into the standby server.

After you logged in into the standby server it reflects the database content of the standby

server. Note that the sessions are greyed out and cannot be manipulated through the standby

server.

Select the Management Servers function under My Work and click the Take over button as

shown in Figure 5-9 on page 91.

Chapter 5. Using TotalStorage Productivity Center for Replication on Windows 2003 91

Figure 5-9 Active - Standby configuration view from standby server

Shortly after clicking on the Take over button, the panel which Figure 5-10 displays is

presented. Note that the sessions are grayed out but the standby server already has the Role

of ACTIVE.

Figure 5-10 Standby server becomes the active server

A few seconds later and another panel refresh cycle Figure 5-11 on page 92 displays the

sessions hyperlink under My work as being active. Now you may issue any TPC for

92 IBM TotalStorage Productivity Center for Replication on Windows 2003

Replication action against any session and it is recorded only in the database of the newly

active server.

Figure 5-11 New active server

Note when the previously active server is still up and running you can still issue also any TPC

for Replication actions against the old active server. But there is no replication action

occurring between both servers. This has the potential to damage your entire TPC for

Replication configuration. Therefore we recommend when you fail over to the standby server

and the previously active server is still up and running that you at least stop the WebSphere

services in the previously active server. This will prevent any changes to the database of the

previously active server.

Right-click My Computer and select the manage token. Select Services and click IBM

WebSphere Application Server to stop this server as Figure 5-12 on page 93 displays

through the Stop the service hyperlink.