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firebase.google.com
Structure Firebase Firestore data to avoid hot-spotting and cost blowups
domain:
firebase.google.com
· 4 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed
Verified steps
Model for your queries: denormalize, one document read per screen where possible
Avoid sequential document IDs (auto-IDs distribute writes)
Paginate with query cursors (startAfter(docSnapshot)), not offset
Aggregate with count()/sum() aggregation queries or maintained counters, not full-collection reads
Known gotchas
Billing is per document READ — a 10k-doc collection listed on every page load is a bill shock
offset() still READS AND BILLS skipped docs — always cursor-paginate
500 writes/sec per document/collection-with-sequential-keys hotspot limit
Security rules are not filters: a query must structurally match the rule or it's denied entirely
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