BlackBerry Attachment Service high availability

To configure BlackBerry® Attachment Service high availability, you can create a pool of two or more BlackBerry Attachment Service instances that a BlackBerry® Enterprise Server can use. You can create one BlackBerry Attachment Service pool for every BlackBerry Enterprise Server and add any number of BlackBerry Attachment Service instances to the pool.

A pool consists of a primary group of BlackBerry Attachment Service instances and an optional secondary group of BlackBerry Attachment Service instances. The BlackBerry Enterprise Server sends requests to the BlackBerry Attachment Service instances in the primary group. If the BlackBerry Attachment Service instances in the primary group cannot process a request, the BlackBerry Attachment Service instances in the primary group forward the request to the instances in the secondary group.

You can configure a BlackBerry Attachment Service instance to process a specific content type only. If you configure multiple BlackBerry Attachment Service instances within a primary or secondary group to process a specific content type only, the instances work together as a load-balanced subgroup.

The BlackBerry Attachment Service pool maintains a health score that indicates whether the pool can convert all content types. If no BlackBerry Attachment Service instance in a pool can convert a specific content type and the attachment viewing threshold marker is above the failover threshold for the primary BlackBerry Enterprise Server, the primary BlackBerry Enterprise Server starts the failover process.


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