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the-akamai-network-a-platform-for-high-performance-internet-applications-technical-publication
Connectivity failure: If connectivity between the origin server and the edge degrades, the platform detects this quickly and uses its path optimization technology to find good alternate paths through intermediate nodes on the
Akamai platform. Note that even if all of the above faults occurred simultaneously, the platform would still recover quickly.

In addition to the robust platform availability that is its direct goal, there area couple of useful byproducts to the recovery- oriented design philosophy. The first is a significant reduction in the number of operations staff needed to manage the network. Because the network is designed with the assumption that components are failing at all times, staff do not need to worry about most failures nor rush to address them. Moreover, staff can be aggressive in proactively suspending components if they have the slightest concern, since doing so will not affect the performance of the overall system. Even though the operations staff is itself distributed across multiple sites, the human staff is not in the critical path for the operation of the network. A second benefit is the ability to roll out software updates in a rapid and non-disruptive manner, as described in Section 7.3. Again, because the failure of a number of machines or clusters does not affect the overall system, zoned software rollouts can be performed quickly and frequently without disrupting services to
Akamaiā€˜s customers. Some interesting metrics relating to the two benefits we cite here are presented in [1].

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