PGM-index
SOSD
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| PGM-index | SOSD | |
|---|---|---|
| 6 | 2 | |
| 751 | 260 | |
| - | 3.1% | |
| 2.8 | 0.0 | |
| 3 days ago | almost 2 years ago | |
| C++ | C++ | |
| Apache License 2.0 | GNU General Public License v3.0 only |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
PGM-index
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Self-indexing RDBMS? Could AI help?
PGM Index
- Piecewise Geometric Model Index
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Manticore Search 5
Manticore Columnar Library uses Piecewise Geometric Model index, which exploits a learned mapping between the indexed keys and their location in memory. The succinctness of this mapping, coupled with a peculiar recursive construction algorithm, makes the PGM-index a data structure that dominates traditional indexes by orders of magnitude in space while still offering the best query and update time performance.
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PGM Indexes: Learned indexes that match B-tree performance with 83x less space
Yep, I'm working on a multidimensional version that I hope to upload to the main repo (https://github.com/gvinciguerra/PGM-index) in a few weeks.
SOSD
- SOSD: A Benchmark for Learned Indexes
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PGM Indexes: Learned indexes that match B-tree performance with 83x less space
For a detailed study of learned indexes, see this work: https://vldb.org/pvldb/vol14/p1-marcus.pdf
All code is available in open source: https://github.com/learnedsystems/SOSD
What are some alternatives?
ALEX - A library for building an in-memory, Adaptive Learned indEX
RadixSpline - A Single-Pass Learned Index
manticoresearch - Easy to use open source fast database for search | Good alternative to Elasticsearch now | Drop-in replacement for E in the ELK soon
robin-map - C++ implementation of a fast hash map and hash set using robin hood hashing
la_vector - 🔶 Compressed bitvector/container supporting efficient random access and rank queries
sdsl-lite - Succinct Data Structure Library 3.0
bolt - 10x faster matrix and vector operations
Huffman-Coding - A C++ compression program based on Huffman's lossless compression algorithm and decoder.
kudu - Mirror of Apache Kudu