Specifications

14 – Configuring and Monitoring a Redundant Server System
320 R400
Synchronizing the Server Databases
At this point the PlantScape Server redundancy configuration is complete. The
primary and backup servers can now be put into redundant mode.
Synchronization is the process of copying over the PlantScape Server database
from the primary server to the backup server. When the Server database on the
backup server is identical to the database on the primary server, the servers are
said to be synchronized.
Note The process whereby database changes on the primary server are automatically
sent to the backup server is known as automatic checkpointing. Automatic
checkpointing from the primary to the backup server does not occur until the two
servers have been synchronized.
To synchronize your servers:
1 Start PlantScape on the primary server and connect a Station to it.
2 Call up the Server Redundancy Status display by selecting View
⇒
System
Status
⇒
Server Redundancy from the Station menu.
Note For information about the fields in this display, see “Monitoring
Redundant Servers” on page 321.
3 Start PlantScape on the backup server.
Within several minutes the LEDs in the Link Status group should change
from red to green and indicate the following:
• Running
• Link n (LINK0n)
4 Select the Synchronize button to synchronize the two servers.
The PlantScape database on the primary server will be automatically copied
to the backup server.
Within a few minutes the systems should be synchronized and running in
redundant mode.
The synchronization indicator (the first LED in the Backup Server group)
should change from red to green and the text change from Unsynchronized
to Synchronized.
plscpcg.book Page 320 Monday, May 28, 2001 10:11 AM