Convert NDJSON to Arrow

NDJSON (Newline Delimited JSON) is a format where each line is a valid JSON object, making it easier to process large datasets sequentially.

Technical Details

Each line in an NDJSON file is a complete, self-contained JSON object ended by a newline character. This allows for streaming processing without loading the entire file into memory.

Advantages

• Streaming-friendly for large datasets
• Easy to append new records
• Each record can be processed independently
• Simpler to parse than JSON arrays for large datasets

Limitations

• No support for cross-record references
• Less widely supported than standard JSON
• Each line must be a complete JSON object
• Not suitable for deeply nested relationships

Apache Arrow is a cross-language platform for in-memory data. It defines a standard columnar memory format for flat and hierarchical data that works across different programming languages. This format is optimized for efficient analytics on modern hardware like CPUs and GPUs.

Arrow can handle complex nested data structures and lets you query and work with specific columns without reading the entire dataset.

Key Features

• Columnar memory format for flat and hierarchical data
• Works with any programming language
• Optimized for analytics and modern hardware
• Supports complex nested data structures
• Enables efficient zero-copy reads

Use Cases

Apache Arrow shines in scenarios like:

• Big data processing and analytics
• Machine learning and AI pipelines
• Data exchange between different systems and languages
• High-performance computing applications

Its efficient memory layout and standardized format make it a great choice for applications that need fast data processing and compatibility between different tools and languages.