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and the original production copy diverges. In most cases, this is because the production copy continues making further changes. Depending on the type of FlashCopy, as the
FlashCopy comes online, any in-flight transactions may be rolled back as part of the vary on process; meaning the production copy shows the transaction happened, and the FlashCopy does not. In addition, additional user-initiated changes can occur on the FlashCopy from this point in time. In the example of use case #1, it is true that the journal receivers are likely not identical between the systems.
IBM i 7.5 did introduce new functionality in this area called ragged flash: https://www.ibm.com/support/pages/node/6579149
This functionality prevents the rollback behavior that occurs during vary on or IPL and enables you to take the receivers from the production copy and apply them to the FlashCopy version at a later point in time if desired. Using ragged FlashCopy would prevent the roll-back upon vary on, but there would still likely be differences between the objects on the system (assuming production continues changing data). Therefore, a save of an object on a Flashcopy, while it may save pretty close to the same object, is not identical to the object on the production copy. For this reason, the save information is not propagated, as we do not want to imply something is saved when in fact, there may be differences that were not saved.
For use case #2, the operating system's remote table functionality may achieve the functionality you are looking for by running table functions on remote IBM i systems. This might allow you to build a query that pulls the information from multiple systems in your environment, provided they are all up at the time. See https://www.ibm.com/support/pages/node/6828079 for additional information.