An open-source columnar data format designed for fast & realtime analytic with big data.
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Nov 16, 2022 - Java
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columnar-storage
Here are 13 public repositories matching this topic...
Index Common Crawl archives in tabular format
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Oct 15, 2026 - Java
A metadata store database for GuinsooLab stack.
embedded database mvcc local-storage xxhash high-performance-computing olap low-latency columnar-storage vectorization b-tree multi-version calculation-engine
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Feb 5, 2023 - Java
Command-line tool to migrate InfluxDB 1.x/2.x and line protocol files to Apache TsFile — auto schema mapping, parallel time-sliced export, resumable and verified.
java cli iot influxdb time-series maven columnar-storage data-migration timeseries-database migration-tool tsfile influxql iotdb line-protocol apache-tsfile timecho
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Sep 16, 2026 - Java
Making DuckDB's capabilities available to the JVM efficiently. Includes a DuckDB-backed CQEngine persistence plugin: 7x less memory, and joins across collections.
java sql analytics jvm jdbc arrow persistence indexing collections olap embedded-database query-engine columnar-storage joins in-memory-database off-heap cqengine memory-optimization duckdb duckdb-jdbc
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Oct 5, 2026 - Java
A containerized distributed data processing system that demonstrates core cloud database concepts through hands-on implementation using Java, Apache Arrow, Iceberg, and Calcite
java docker distributed-systems spring-boot analytics grpc parquet query-engine columnar-storage data-processing sql-engine cloud-database containerization learning-platform apache-arrow apache-calcite apache-iceberg database-architecture
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Nov 1, 2025 - Java
QTSurfer Lastra: columnar time series format with per-column codecs, row groups, and CRC32 integrity. ALP/Gorilla/Pongo for doubles, delta-varint for timestamps, ZSTD/gzip for binary. Java 11+
compression time-series format zstd columnar-storage financial-data columnar alp lastra lastra-format
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Aug 10, 2026 - Java
Annotation-generated in-memory columnar stores for Java projection interfaces
java data-structure annotation-processor simd data-structures in-memory java-library columnar-storage simd-programming annotation-processing simd-instructions maven-central cache-locality
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Sep 17, 2026 - Java
Schema-defined, compiler-specialized Java 8 library for high-performance, type-safe computation over large, frequently changing in-process runtime state.
high-performance-computing type-safe java-8 code-generation columnar-storage runtime-state schema-defined
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Aug 13, 2026 - Java
Migrate InfluxDB data to Apache TsFile with a command-line tool for seamless cloud retirement transition.
java cli iot influxdb time-series maven columnar-storage data-migration timeseries-database migration-tool tsfile influxql iotdb line-protocol apache-tsfile timecho
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Oct 12, 2026 - Java
Pure Java implementation of the ALP (Adaptive Lossless floating-Point) compression algorithm (Afroozeh & Boncz, SIGMOD 2024). Zero dependencies, streaming API, Java 11+
compression time-series lossless columnar-storage floating-point compression-algorithm lossless-compression-algorithm ieee754
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Jul 13, 2026 - Java
Learn columnar storage internals by building a mini analytics DB on top of Apache Lucene.
java analytics codec lucene columnar-storage vectorization database-internals learning-project docvalues
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May 29, 2026 - Java
Generated batch loaders from Hardwood into Columnar Projection Store without row materialization.
java annotation-processor simd parquet java-library columnar-storage simd-programming annotation-processing simd-instructions parquet-files apache-parquet maven-central parquet-tools parquet-viewer parquet-format hardwood
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Sep 18, 2026 - Java
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