QA: What is the .xdf file format?

The .xdf format is a binary file format that: 
  • Stores data in blocks for efficient reading of arbitrary columns and contiguous rows
  • Contains associated metadata, such as variable names, descriptions, and data storage types
  • Supports a richer set of data storage types than R (eight types of integers, two types of floating point numbers
  • Writes data blocks of rows so that data processing can be optimized
  • Processes data in chunks (groups of blocks)
  • Optimizes the block sizes depends on individual computer bandwidth for I/O
  • Contains meta information at the end of the .xdf file rather than the beginning for easy updating
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Article ID: 3104260 - Last Review: 10/29/2015 08:15:00 - Revision: 1.0

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