Monday, October 22, 2007

Delayed Fan-Out Routing.

A previous post called 'a wierd one' may be solved with the info below, although i'm not entirely sure....the text below comes from a microsoft online course.

A message flow is disrupted if no Hub Transport server is available in the destination site. In such a situation, the message is routed to the closest Hub Transport server along the most optimal route. This is referred to as Queuing Messages at the Point of Failure.
The closest Hub Transport server then delivers the message when a Hub Transport server in the destination site becomes available. If a message has to be delivered to recipients at multiple sites, a copy of the message is delivered directly to the recipients at each site.
However, if destination Hub Transport servers are not available, then the source Hub Transport server delays making copies of the message for each recipient and sends a single message that is queued for delivery at the Hub Transport server that is closest to the destination sites.
When the destination sites become available, the queued message is sent to each site with a recipient. This is referred to as Delayed Fan-Out Routing.

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