Specify the outage record policy before treating a successful reconnect as proof that every intervening observation was recovered.
Name the retention policy
AWS documents stream management with local retention and export policies for intermittent connectivity. Recovering a connection and recovering a historical sequence are different capabilities. Primary reference: stream retention and export.
The cited implementation illustrates configurable storage boundaries; it is not an assertion that HM equipment uses that service. A latest-value display after reconnect cannot establish what the source retained during an outage.
A hypothetical backlog estimate
Assume a proposed application records ten events per second during a 30 minute disconnection. The generated backlog is 10 times 1800, or 18000 events. At an invented 200 bytes per stored record, raw record bytes alone total 3.6 million bytes. Index, metadata and storage overhead are not included.
If the actual policy retains only the latest observation, that capacity calculation is irrelevant to historical recovery: most occurrences are never preserved by that policy. If a bounded queue is proposed, its expiry and overflow behavior still need review. The arithmetic gives no guaranteed storage or export rate.
Define recovery evidence
Record source event rate, outage interval, retention quantity/time bounds, overflow policy, export ordering and duplicate handling. Ask how the consumer recognizes a gap and distinguishes stored occurrence time from later receipt. Preserve the accepted recovery scenario and its expected count or sequence.
This guide changes no retention settings and claims no HM cloud integration. It helps a buyer compare latest-state restoration with store-and-forward history. Neither a green connection icon nor a recent final value should become a claim of complete outage evidence without the corresponding retention and recovery record.
Customer Questions
Does reconnect prove every missed event returned?
Check retention and recovery policies.
How many events are in the stated example?
Eighteen thousand before any policy loss.
Does 3.6 MB include every storage overhead?
It counts hypothetical raw record bytes only.
Primary References
These references support the technical principles discussed in this guide. The worked examples and review questions are educational.
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