Core concept
Provisioned: pre-allocate RCU/WCU. Cheaper if predictable. On-demand: pay per request. Simpler.
Advertisement
How it works
GSI (Global Secondary Index): alternate access pattern. LSI: same partition, alternate sort. Streams for CDC.
Advertisement
Trade-offs + gotchas
Session store. Metadata catalog. Serverless apps. IoT ingest. Anything key-value + fast at scale.