“What I cannot create, I do not understand” - Richard Feynman
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- tiny-yacc-parser: YACC, SQL
Parser - tiny-sql-rewriter: SQL
rewriter, analyser - tiny-binder:
Binder, Catalog, Type Coercion, Function Overloading - tiny-dataframe:
RBO,Execution Engine,Push-based Execution, Runtime, Visitor, Parquet, Arrow - tiny-rule-based-optimizer: Parser,
Binder, Catalog, RBO,Execution Engine,Push Based Execution - joins: Join using Spark Execution Engine.
Grace Hash Join,Sort Merge Join,Nested Join - tiny-ssi-txn: Snapshot Isolation Level, Serializable
Transactions - isolation_levels: Isolation Level, SSI and WSI.
- lsm tree:
Storage Engine, Memtable, WAL - col-fs: Columnar/Row Format,
File Storage, S3 - tiny-java-db:
Volcano Model, Query Optimizer,Binder,Secondary Index
┌───────┐ ┌───────┐ ┌───────┐
│ │ │ │ │ │
│Parse ├─►│Rewrite├─►│Binder ├──┐ ┌───────┐ ┌───────┐ ┌──────┐ ┌───────┐ ┌───────┐
│ │ │ │ │ │ │ │ RBO │ │ │ │ │ │ Txn │ │ Col │
└───────┘ └───────┘ └───────┘ ├──►│ + ├─►│ Exec ├─►│Run ├───►│ + |──►| LSM │
│ │ CBO │ │Engine │ │time │ │ WAL │ │ │
┌───────┐ │ └───────┘ └───────┘ └──────┘ └───────┘ └───────┘
│Data │ │
│Frame ├──┘
│Builder│
└───────┘- workerpool:
job queue,worker pool - memorypool:
memory management,gc lang - lotsaa:
benchmark,concurrent access - tiny-compiler: Covers examples for
AST, ANTLR, andVisitorPattern - tiny-dependency-injection:
Dependency InjectionFramework
“A complex system that works is invariably found to have evolved from a simple system that worked...” - John Gall
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- MatrixOrigin Join Modules: Optimizer Runtime Filter, ColExec for SEMI, INNER, LEFT, RIGHT, INDEX, SINGLE joins
- MatrixOrigin Txn Module: Txn, Insert, Delete, Truncate
- CRDB Txn Module: Txn, WSI, SSI
- matrixorigin-lite: Vectorized
Execution Engine, Push based execution model - prometheus-lite: Parser, PromQL,
TSDB - crdb-lite: RBO, CBO, exec engine, type coercion
- tidb-lite: RBO, CBO, exec engine, parser
- risingwave-lite: Streaming database
- datafusion-cbo: Cost based optimizer
- TinySQL: TiDB
- TinyKV: TiKV
- BusTub: CMU
- RoseDB: Bitcask
- LotusDB: LSM
- LotusSearch: Search
- Wal: WAL
- DiskHash: HashMap, WAL
"The best time to plant a tree was 20 years ago. The second best time is now." - Chinese Proverb
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- Badger: WiscKey Paper, WSI transaction
- MatrixOrigin: Go, Vectorized Execution, Parser, Push based
- Prometheus: TSDB, PromQL, Loki
- CockroachDB: Go, RBO, CBO, exec engine
- TiDB: RBO, CBO, exec engine, Go/Rust
- Hermitage: Isolation Levels, Tests
- HaloDB: InMemory, KV,
Log Structure, Bitcask - OHC: Cache,
OffHeap, GC, Big Cache - LevelDB: Embedded
LSMTree - StormDB: Embedded DB similar to HaloDB
- FrostDB:
Push Based Exec, Arrow, Parquet,RBO, Parser,LSM
- Datafusion: Rust, query engine
- Presto: Java, RBO, CBO
- DuckDB: C++
- Go-YCSB: KV Benchmark,
YCSB
"You don't understand anything until you learn it more than one way." – Marvin Minsky
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- Querify Labs Blog - Good blog on optimizers.
- Designing Data-Intensive Applications
- Database Design and Implementation - Great for understanding embedded Java databases like Apache
Derby - How Query Engine Works: An Introductory Guide - Great for understanding Query Engine like Arrow
Datafusion
"If you can't explain it simply, you don't understand it well enough." - Albert Einstein
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- WiscKey: Separating Keys from Values in SSD-conscious Storage - LSM Tree for large values
- Copy Ahead Segment Ring - New Memtable Design, Evolution of Database Systems
- TinyDB - Tiny Database written in Java
- Tiny Compiler - Tiny Compiler written in Java
- Design Patterns - Design Pattern from GoF.
"It always seems impossible until it's done." - Nelson Mandela
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- MaxtrixOrigin
- CometKV : WIP, Comparing different memtables
- Vector Index Paper: Pending
- Memtable Paper: Pending