Global traffic now is dominated by video, all reports suggest. According to Rethink Research, between 60 percent and 75 percent of total wide area network traffic consists of video. As entertainment video created the demand for edge caching and content delivery networks, so new applications are driving demand for edge computing.
Though the edge computing value proposition is clearest for apps that require ultra-low latency, privacy, minimized WAN costs or protection from intermittent connectivity all are reasons to use edge computing.
Improved isolation and security, possibly to support regulatory or corporate compliance rules, can be the edge computing value driver. Workloads running on-premises do not send data into the public cloud. Edge-processed data also can be obscured, transformed, or encrypted prior to sending it upstream to a far-edge data center for archiving or backup.
Improved jitter performance is another advantage of edge computing, for applications that require predictable packet arrival. That might be similar to the value provided by edge caches of entertainment video, which do not traverse the WAN, and which generally consist of non-real-time content.
Edge facilities might not help for video conferencing using the public internet, which must, almost by definition, traverse the WAN.
In some instances, where connectivity suffers from intermittent availability, on-premises processing provides continuity. Venues such as cruise ships, airplanes, oil rigs and vehicles provide examples.
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