❌ Complexity – key management, coordination overhead ❌ Larger signatures or additional rounds of communication ❌ Not standardized across all systems
Definition: A multikey index is an index on an array field in a document database (e.g., MongoDB). Each value in the array gets a separate index entry pointing to the same document. multikey
❌ Only one array field per compound index (MongoDB limitation) ❌ Index size can explode if arrays are huge (each element → one index entry) ❌ Performance degrades with very high cardinality arrays (many unique values per document) ❌ Complexity – key management, coordination overhead ❌
