Currently Informix supports a Primary and multiple RSS servers. We have one of the RSS servers with the DELAY_APPLY config set to 12H and the 12 hours of logs get stored on the RSS server in the LOG_STAGING_DIR. Informix currently supports rolling forward of the logs of the RSS server to a specific date/time using the STOP_APPLY config parameter. This is very useful in the event of an issue on the Primary you can roll forward the RSS to a few moments before the issue and then switch to the RSS server.
However, as we painfully discovered during a real life outage, the STOP_APPLY functionality only works when the RSS is connected to the primary. Our primary went down and we tried rolling forward the logs using the STOP_APPLY functionality and discovered that the RSS server would not roll forward the logs even though they are stored locally on the RSS server in the LOG_STAGING_DIR. As per a support case, Informix support is confirming that this is indeed the current design architecture.
|Who would benefit from this IDEA?||As a customer this would offer significant reliability and safety having the ability to roll forward logs to a specific time when the RSS loses connection to the Primary.|
How should it work?
Informix should allow the ability to roll forward the logs of the RSS server using the STOP_APPLY functionality even when it is not connected to the primary.
|Priority Justification||It is ranked high because this is a basic feature of High Availability so that there can be multiple ways to recover from an outage.|
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