Designing a 99.999% IoT Platform

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The symptoms are familiar: device fleets that flood your broker after a region blip, firmware campaigns that stall because the device registry is quarantined, and business teams escalating because analytics lose a window of truth during maintenance. You get paged at 03:00 to manually re-route traffic, and the postmortem shows the same root causes as last quarter: single-region control plane, opaque dependency maps, and brittle runbooks. Contents Why 99.999% uptime is non-negotiable for real-world IoT fleets Architectural patterns that actually deliver five nines How to build a resilient multi-

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