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Synchronization Process for Multi-Server Architectures

Synchronization is used to allow the Standby servers in multi-server architectures to accurately reflect the data on the Main server. During the synchronization process, the Main server checks the data on the Standby servers and updates them as required.

The way that the synchronization process works differs slightly depending on whether the servers have Duty Mode enabled or disabled. However, in both cases the synchronization process consists of a ‘first pass’ and ongoing ‘short passes’. The ‘first pass’ occurs when the Main server first connects or re-connects to another server and usually takes longer to complete than a ‘short pass’ as there is more data to be transferred. The ‘short passes’ occur continuously after the ‘first pass’ has completed. They allow the Main server to update the Standby servers regularly.

For more information on the ‘first pass’ or ‘short pass’ part of the synchronization process, see the topics that are listed in the gray footer section at the bottom of this topic. Select the relevant entry to display the topic that you require.

If you are unsure as to whether your server has Duty Mode enabled or disabled, you can view the setting on the Partners section of the Server Configuration Tool (see Enable or Disable Duty Mode).


ClearSCADA 2015 R2