Design a Sparse Incident Index

Build an open-incident queue without scanning every device record. A sparse index should include only items that currently belong in the queue. If every device carries the index key, the index is no longer sparse and the queue grows with the whole table. A scheduled job scans 2.8 million devices to find open incidents. Only open incidents carry queue index keys, ordered by severity and open time. Name the exception Open incident requiring support action Sparse indexes are strongest when the indexed state is rare and operationally important. Add index keys only in that state GSI1PK=OPEN_INCIDENT Closed or healthy devices…

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