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A Member Node requests synchronization by a Coordinating Node.
Member Node synchronization is typically driven by the Coordinating Node which polls Member Nodes on a regular basis and performing synchronization as necessary. Some situations may benefit from the Member Node requesting synchronization. For example:
A large amount, or perhaps high priority data was added to a MN and the owners or curators prefer to have the content synchronized as soon as possible rather than during the next scheduled time.
A MN may be going offline (e.g. unscheduled maintenance) and the administrator wants to ensure the synchronized content is up to date beforehand.
Note there is some implication that MN replication will also be driven by this request (a process downstream from synchronization)
Member Node administrator
Member, Coordinating Nodes operational
Member node registered
New content exists on a Member Node
Administrator requests synchronization
Curator or owner requests synchronization
Member Node logic determines that synchronization is necessary
Member Node synchronization is scheduled