90 IBM TotalStorage Productivity Center for Replication on Windows 2003
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.

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