we want to build a metadata replicate mechanism to replicate all the metadata changes from ROS (record object store) to FPOS (file plan object store). The mechanism must be reliable and the changes must be in order.

Using "update event" action is not a good option as sometimes it could fail. Reading changes based on audit log (update event) and do the replicate seems like a better idea but the challenge is how to track which event has been proceeded as there is no way we can update a event object itself.

any idea or suggestion? thanks in advance.

Absolutely not sure, but have ou looked at audit processing bookmarks? They are supposed to be a 'high-watermark' of processed audit events...

Hope this helps,

/gerold