Compare
Avro vs ORC
Avro is commonly used to exchange schema-governed records. ORC stores typed data by column for analytical reading.
Which format should you choose?
Consider Avro for record-oriented pipelines and ORC for supported analytical systems that read selected columns.
Good fit for Avro
Exchange records with a defined schema
- Events and data pipelines that track schema versions
Good fit for ORC
Store large structured tables for analytics
- Queries reading selected columns and using indexes
Basic information
| Field | Avro | ORC |
|---|---|---|
| Extension | .avro | .orc |
| MIME type | application/avro | application/vnd.apache.orc |
| Common uses | Exchange records with a defined schema | Store large structured tables for analytics |
| How to open | Use an Avro-aware tool to inspect the schema, fields, types, and records. | Use an ORC-aware tool to inspect schema, columns, row counts, compression, and sample values. |
| Export or convert | When converting to JSON or Parquet, verify field names, types, nulls, logical types, record counts, and schema compatibility. | When converting to Parquet or CSV, verify types, nulls, timestamps, decimals, partitions, and row counts. |
Choose by use case
Events and data pipelines that track schema versions
Exchange records with a defined schema
AvroQueries reading selected columns and using indexes
Store large structured tables for analytics
ORCKey point 1
Avro centers on records and their schemas.
More on the differencesKey point 2
ORC uses columnar storage and indexes for analytics.
More on the differencesMore on the differences
Choose according to the processing pattern and the tools in the target platform. Test schema handling and representative queries.
- Avro suits record serialization and interchange.
- ORC is designed for column-oriented analytical reads.
- Engine support and workload matter more than a universal format ranking.
Frequently asked questions
Can ORC simply replace Avro in an event pipeline?
Not automatically. Check whether the pipeline expects record messages or columnar analytical files.