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Doc: add warning about changing segments_per_dir values

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Zhuoyun Wei 2017-07-20 12:52:52 -04:00
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commit f0de6a4c90
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docs/internals/data-structures.rst
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@ -88,7 +88,10 @@ Segments
~~~~~~~~
Objects referenced by a key are stored inline in files (`segments`) of approx.
500 MB size in numbered subdirectories of ``repo/data``.
500 MB size in numbered subdirectories of ``repo/data``. The number of segments
per directory is controlled by the value of ``segments_per_dir``. If you change
this value in a non-empty repository, you may also need to relocate the segment
files manually.
A segment starts with a magic number (``BORG_SEG`` as an eight byte ASCII string),
followed by a number of log entries. Each log entry consists of: