Message output when a failover occurs

The HULFT clustering function sequentially accumulates the processing status messages, such as messages about the status of sending and receiving, in the Processing Status Storage file. If the clustering software detects a failure and a failover occurs while HULFT is operating, the processing state at the time of the failure is output as a message (that is, event or console log record), which is described based on the content of the Processing Status Storage file. The administrator can then perform a restoration based on the message.

You can specify the limit of messages allowed in the Processing Status Storage file (or size of the file). If the limit is set too small, the processing state may not be displayed correctly at the time of a failover. If the Processing Status Storage files are small in size, the processing state may not be displayed correctly when a failover occurs. In this case, you need to increase the number.

A message, with the size in the range from 200 bytes to approximately 1 KB per sending or receiving operation, is output to the Processing Status Storage file. The size varies depending on the management information settings.