Knowledge & Data · Software component

Parallel Sub-Query Retrieval Controller

Software componentKnowledge & DataKnowledge & Dataarc:ParallelSubQueryRetrievalController

A retrieval control component that issues retrieval for all independent sub-queries concurrently and gathers per-sub-query context, so total latency approximates the slowest single retrieval.

Responsibility. Retrieves context for independent sub-queries concurrently.

Also known as: Parallel retrieval, Concurrent sub-query retrieval

Direct neighbourhood (hover for relationship types)

Relationships

invokes dependency

Retriever abstract Ch6.6

emits telemetry to dynamic

Metrics Collector Ch6.6

receives data from dynamic

Question Decomposer Ch6.6

sends data to dynamic

Multi-Hop Answer Synthesizer Ch6.6

is orchestrated by control

RAG Query Orchestrator Ch6.6

Design guidance

SHOULD execute sub-query retrievals concurrently rather than sequentially.
SHOULD report sub-query count, successful retrievals and per-sub-query chunk counts to detect sub-queries that consistently retrieve nothing.

Quantitative guidance

As stated by the sources; verify before use.

Four sub-queries: ~800 ms sequential (4 x 200 ms) vs ~200 ms concurrent (Ch6.6).

Classification

Patterns: Scatter-gather retrievalasyncio.gather fan-out
Quality attributes: Performance efficiency (ISO/IEC 25010)Maintainability (ISO/IEC 25010)
Risks mitigated: Latency multiplication from sequential sub-query retrieval

Sources

Ch6.6: T. Nguyen, "Query Decomposition and Adaptive Retrieval," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 6.6. ISBN: 9798244538229.