An operations team is sizing long-term storage for an Instana deployment and must understand how metric data is stored over time. Which statement correctly describes how Instana handles infrastructure metric granularity and retention?

Instana captures infrastructure metrics at 1-second granularity to provide real-time, fine-grained visibility for active troubleshooting. As data ages, Instana applies automated rollup to coarser time intervals, significantly reducing long-term storage requirements while preserving trend data for capacity and performance analysis. Understanding this rollup behavior is essential for accurately estimating Cassandra disk capacity requirements during planning. The correct answer is 'Instana stores metrics at 1-second granularity for recent data and automatically applies rollup aggregation to coarser intervals as data ages'. The incorrect options — 'All metrics are stored at 1-minute granularity for 90 days with no aggregation applied', 'Metrics are stored at 5-minute granularity with a fixed 30-day retention period and then permanently deleted', 'Instana stores all metrics at 10-second granularity indefinitely at full resolution' — are wrong because they do not align with IBM Instana's architecture or recommended practices for this scenario. Understanding this concept is essential for the Domain 5: Planning domain of the IBM Instana Observability certification.