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fixed ovlog tests

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and updated man page
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Yann Collet
2018-12-12 21:09:14 -08:00
parent f2f86d369b
commit 1993f5d412
4 changed files with 14 additions and 13 deletions
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programs/zstd.1.md
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@@ -415,11 +415,12 @@ The list of available _options_:
Reloading more data improves compression ratio, but decreases speed.
The minimum _ovlog_ is 0, and the maximum is 9.
0 means "no overlap", hence completely independent jobs.
1 means "no overlap", hence completely independent jobs.
9 means "full overlap", meaning up to `windowSize` is reloaded from previous job.
Reducing _ovlog_ by 1 reduces the amount of reload by a factor 2.
Default _ovlog_ is 6, which means "reload `windowSize / 8`".
Exception : the maximum compression level (22) has a default _ovlog_ of 9.
Reducing _ovlog_ by 1 reduces the reloaded amount by a factor 2.
For example, 8 means "windowSize/2", and 6 means "windowSize/8".
Value 0 is special and means "default" : _ovlog_ is automatically determined by `zstd`.
In which case, _ovlog_ will range from 6 to 9, depending on selected _strat_.
- `ldmHashLog`=_lhlog_, `lhlog`=_lhlog_:
Specify the maximum size for a hash table used for long distance matching.