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Sphinx: A Succinct Perfect Hash Index for x86

Summary: Sphinx reengineers succinct perfect hashing for x86, combining rank/select-friendly encoding with metadata for near-instant common-slot decoding. Its expandable, parallel design halves query/update latency and memory versus prior ~4-bit-per-key indexes. (summarized by gpt-5.6-luna on Jul 24 2026)

Paper ID
hadfb1fbe1487fa75
Venue
VLDB
Year
2025
Pagerank
5.1453267e-05
Overall Rank
9,647 | 35.14%
DOI
10.14778/3749646.3749703

Incoming Non-self Citations Over Time

Authors

BibTeX Citation

@article{maghrebi_vldb25,
        title = {{Sphinx: A Succinct Perfect Hash Index for x86}},
        author = {Maghrebi, Sajad Faghfoor and Dayan, Niv},
        journal = {PVLDB},
        series = {{VLDB} '25},
        volume = {18},
        number = {11},
        pages = {4424--4437},
        doi = {10.14778/3749646.3749703},
        url = {https://doi.org/10.14778/3749646.3749703},
        year = {2025}
}

Incoming Citations (Sorted by Pagerank)

Showing 2 of 2 citing papers.

Rank Citing Paper Year Venue Pagerank
10,441 Dynamic Flat Filter: A Unified Framework for Scalable and Stable Fingerprint-Based Filters 2026 SIGMOD 4.9793485e-05
10,518 Zeno Filter: To Infinity in Tiny Steps 2026 SIGMOD 4.9793485e-05
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Outgoing Citations (Sorted by Pagerank)

Showing 22 of 22 cited papers.

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

Rank Cited Paper Year Venue Pagerank
546 Faster: A Concurrent Key-Value Store with In-Place Updates 2018 SIGMOD 0.00016590738
789 Don't Thrash: How to Cache Your Hash on Flash 2012 VLDB 0.0001397781
816 SlimDB: A Space-Efficient Key-Value Storage Engine For Semi-Sorted Data 2017 VLDB 0.00013687311
974 FlashStore: High Throughput Persistent Key-Value Store 2010 VLDB 0.00012757454
1,359 Dash: Scalable Hashing on Persistent Memory 2020 VLDB 0.00010919021
1,665 SkimpyStash: RAM Space Skimpy Key-Value Store on Flash-based Storage 2011 SIGMOD 9.9384098e-05
1,844 Morton Filters: Faster, Space-Efficient Cuckoo Filters via Biasing, Compression, and Decoupled Logical Sparsity 2018 VLDB 9.5159229e-05
2,071 A General-Purpose Counting Filter: Making Every Bit Count 2017 SIGMOD 9.0866982e-05
2,766 LogBase: A Scalable Log-structured Database System in the Cloud 2012 VLDB 8.0432817e-05
3,130 Improving Flash Write Performance by Using Update Frequency 2013 VLDB 7.6146434e-05
3,285 Performance-Optimal Filtering: Bloom Overtakes Cuckoo at High Throughput 2019 VLDB 7.4559907e-05
3,712 Vector Quotient Filters: Overcoming the Time/Space Trade-Off in Filter Design 2021 SIGMOD 7.078249e-05
4,733 LogStore: A Cloud-Native and Multi-Tenant Log Database 2021 SIGMOD 6.4459155e-05
5,081 InfiniFilter: Expanding Filters to Infinity and Beyond 2023 SIGMOD 6.2854372e-05
5,483 Plush: A Write-Optimized Persistent Log-Structured Hash-Table 2022 VLDB 6.1103271e-05
5,577 Aerospike: Architecture of a Real-Time Operational DBMS 2016 VLDB 6.0787804e-05
6,547 Memento Filter: A Fast, Dynamic, and Robust Range Filter 2024 SIGMOD 5.7509499e-05
7,416 Is Perfect Hashing Practical for OLAP Systems? 2024 CIDR 5.5331654e-05
7,940 Aleph Filter: To Infinity in Constant Time 2024 VLDB 5.4219572e-05
8,241 Pea Hash: A Performant Extendible Adaptive Hashing Index 2023 SIGMOD 5.370431e-05
9,051 Adaptive Quotient Filters 2024 SIGMOD 5.2304894e-05
9,662 The End of Moore’s Law and the Rise of The Data Processor 2021 VLDB 5.1453267e-05
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