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Orc

Apache ORC columnar storage format reference. File structure with stripes and indexes, schema types with evolution rules, compression codecs (ZLIB/SNAPPY/ZSTD), orc-tools CLI, Python/Java writer APIs, Hive ACID transactions, Spark integration, and performance tuning with bloom filters.

bytesagain a295dee 2 files · 15.3 KB Updated 12 repo stars
Integrations & APIs

File contents

Apache ORC

Apache ORC columnar storage format reference.

Commands

Command Description
intro ORC overview, file structure, vs Parquet
schema Types, complex types, schema evolution
compression ZLIB/SNAPPY/LZO/ZSTD codecs, ratios
read orc-tools CLI, Python/Java read APIs
write Writer APIs, stripe/buffer sizing
hive Hive integration, ACID transactions
spark Spark ORC read/write, pushdown
performance Bloom filters, indexes, vectorized reads

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