25 lines
1.1 KiB
Text
25 lines
1.1 KiB
Text
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Prune will delete files from the specified set targeting a given
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distribution of the files within time as well as size, number, and
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age constraints. Its main purpose is to keep a set of daily-created
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backup files in manageable size, while still providing reasonable
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access to older versions. Specifying a size, file number, or age
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constraint will simply remove files starting from the oldest, until
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the constraint is met. The distribution specification (exponential,
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Gaussian (normal), or Fibonacci) provides finer control of the files
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to delete, allowing the retention of recent copies and the increasingly
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aggressive pruning of the older files. The retention schedule
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specifies the age intervals for which files will be retained. As
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an example, an exponential retention schedule for 10 files with a
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base of 2 will be
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1 2 4 8 16 32 64 128 256 512 1024
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The above schedule specifies that for the interval of 65 to 128
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days there should be (at least) one retained file (unless constraints
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and options override this setting).
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WWW: http://www.spinellis.gr/sw/unix/prune
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- Diomidis Spinellis dds@aueb.gr
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