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distribution of the files within time as well as size, number, and
age constraints. Its main purpose is to keep a set of daily-created
backup files in manageable size, while still providing reasonable
access to older versions. Specifying a size, file number, or age
constraint will simply remove files starting from the oldest, until
the constraint is met. The distribution specification (exponential,
Gaussian (normal), or Fibonacci) provides finer control of the files
to delete, allowing the retention of recent copies and the increasingly
aggressive pruning of the older files. The retention schedule
specifies the age intervals for which files will be retained.
Submitted by: dds
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