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Add split=# to cli

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Jennifer Liu
2018-06-29 17:54:41 -07:00
parent 52fbbbcb6b
commit 348e5f77a9
3 changed files with 15 additions and 6 deletions
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programs/zstd.1.md
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@@ -223,11 +223,12 @@ Compression of small files similar to the sample set will be greatly improved.
This compares favorably to 4 bytes default.
However, it's up to the dictionary manager to not assign twice the same ID to
2 different dictionaries.
* `--train-cover[=k#,d=#,steps=#]`:
* `--train-cover[=k#,d=#,steps=#,split=#]`:
Select parameters for the default dictionary builder algorithm named cover.
If _d_ is not specified, then it tries _d_ = 6 and _d_ = 8.
If _k_ is not specified, then it tries _steps_ values in the range [50, 2000].
If _steps_ is not specified, then the default value of 40 is used.
If _split_ is not specified, then the default value of 80 is used.
Requires that _d_ <= _k_.
Selects segments of size _k_ with highest score to put in the dictionary.
@@ -249,6 +250,8 @@ Compression of small files similar to the sample set will be greatly improved.
`zstd --train-cover=k=50 FILEs`
`zstd --train-cover=k=50,split=60 FILEs`
* `--train-legacy[=selectivity=#]`:
Use legacy dictionary builder algorithm with the given dictionary
_selectivity_ (default: 9).