Accelerating String-key Learned Index Structures via Memoization-based Incremental Training

Summary: Memoizes QR decomposition to incrementally retrain string-key learned indexes by touching only updated keys, eliminating dependence on total data size. FPGA offload speeds training and frees CPU; SIA boosts throughput 2.6–3.4× vs ALEX/LIPP/SIndex. (summarized by gpt-5-mini on Feb 09 2026)

Paper ID: 13419
Venue: VLDB
Year: 2024
Pagerank: 4.5873372e-05
Overall Rank: 8,079 | 43.86%
DOI: 10.14778/3659437.3659439

Incoming Non-self Citations Over Time

Authors

Incoming Citations (Sorted by Pagerank)

Showing 4 of 4 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank
9,618	A New Paradigm in Tuning Learned Indexes: A Reinforcement Learning Enhanced Approach	2025	SIGMOD	4.3131993e-05
10,331	LiBox: A Learned Index as an Array to Minimize Last-Mile Search	2026	VLDB	4.1905499e-05
10,407	VEGA: An Active-tuning Learned Index with Group-Wise Learning Granularity	2025	SIGMOD	4.1905499e-05
10,571	FB+-tree: A Memory-Optimized B+-tree with Latch-Free Update	2025	VLDB	4.1905499e-05

Outgoing Citations (Sorted by Pagerank)

Showing 29 of 29 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank	Cited Paper	Year	Venue	Pagerank
101	The Case for Learned Index Structures	2018	SIGMOD	0.00049778866
819	ALEX: An Updatable Adaptive Learned Index	2020	SIGMOD	0.00016237497
844	The PGM-index: a fully-dynamic compressed learned index with provable worst-case bounds	2020	VLDB	0.00015964123
1,365	FITing-Tree: A Data-aware Index Structure	2019	SIGMOD	0.00012379754
1,438	Benchmarking Learned Indexes	2021	VLDB	0.00011965956
1,464	Learning Multi-dimensional Indexes	2020	SIGMOD	0.0001184772
1,887	Tsunami: A Learned Multi-dimensional Index for Correlated Data and Skewed Workloads	2021	VLDB	0.00010201938
2,108	LISA: A Learned Index Structure for Spatial Data	2020	SIGMOD	9.5283642e-05
2,550	Updatable Learned Index with Precise Positions	2021	VLDB	8.5569576e-05
3,136	FINEdex: A Fine-grained Learned Index Scheme for Scalable and Concurrent Memory Systems	2022	VLDB	7.4926368e-05
3,545	Rosetta: A Robust Space-Time Optimized Range Filter for Key-Value Stores	2020	SIGMOD	6.9831585e-05
3,945	APEX: A High-Performance Learned Index on Persistent Memory	2022	VLDB	6.605467e-05
4,040	In-RDBMS Hardware Acceleration of Advanced Analytics	2018	VLDB	6.5052227e-05
4,069	CDFShop: Exploring and Optimizing Learned Index Structures	2020	SIGMOD	6.4744708e-05
4,404	TreeLine: An Update-In-Place Key-Value Store for Modern Storage	2023	VLDB	6.2052645e-05
4,830	CARMI: A Cache-Aware Learned Index with a Cost-based Construction Algorithm	2022	VLDB	5.8884997e-05
5,072	Learned Index: A Comprehensive Experimental Evaluation	2023	VLDB	5.7121108e-05
5,154	Hist-Tree: Those Who Ignore It Are Doomed to Learn	2021	CIDR	5.6548237e-05
5,327	DILI: A Distribution-Driven Learned Index	2023	VLDB	5.5660777e-05
5,343	Learned Index Benefits: Machine Learning Based Index Performance Estimation	2022	VLDB	5.5582234e-05
5,601	PLIN: A Persistent Learned Index for Non-Volatile Memory with High Performance and Instant Recovery	2023	VLDB	5.4158958e-05
5,655	NFL: Robust Learned Index via Distribution Transformation	2022	VLDB	5.3877506e-05
6,442	Updatable Learned Indexes Meet Disk-Resident DBMS - From Evaluations to Design Choices	2023	SIGMOD	5.0541252e-05
6,488	FILM: a Fully Learned Index for Larger-than-Memory Databases	2023	VLDB	5.0378878e-05
6,806	LMSFC: A Novel Multidimensional Index based on Learned Monotonic Space Filling Curves	2023	VLDB	4.917024e-05
7,549	LIDER: An Efficient High-dimensional Learned Index for Large-scale Dense Passage Retrieval	2023	VLDB	4.7089636e-05
8,221	Sieve: A Learned Data-Skipping Index for Data Analytics	2023	VLDB	4.5511941e-05
8,636	WISK: A Workload-aware Learned Index for Spatial Keyword Queries	2023	SIGMOD	4.4758336e-05
9,819	Trie Memtables in Cassandra	2022	VLDB	4.2723184e-05

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