Unverified50% confidenceSolutionExact time
ANN indexes (especially graph-structured HNSW) are difficult to delete from in place efficiently, so a compromise of 'soft delete + periodic merge' is usually adopted.
1
Sources
50%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedFor HNSW graph index-based databases (such as Qdrant and Weaviate), deleting a node requires repairing graph connections and causes graph quality degradation; IVF-based systems handle deletion more straightforwardly but require periodic reconstruction of cluster centers; Milvus uses LSM-Tree-style segment management, first marking deletions and then physically clearing them during compaction.69% similarUnverifiedSoft deletion refers to not immediately removing data from physical storage when deleting a record, but instead marking it as logically deleted via a flag bit, used to support data recovery, audit trails, and to avoid the performance overhead of frequent physical deletions.63% similarUnverifiedWhen the total number of tokens exceeds the context window limit, Ollama adopts a strategy of truncating the earliest content (sliding window), rather than returning an error or compressing58% similarUnverifiedSoft deletion (PATCH active=false) is a more common deprovisioning practice than hard deletion.58% similar
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