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Rename and add short ldm parameters in cli

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Stella Lau
2017-09-05 21:11:18 -07:00
parent 98b85426f1
commit c706de5395
5 changed files with 27 additions and 30 deletions
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programs/zstd.1
+8 -8
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@@ -327,7 +327,7 @@ Determine \fBoverlapSize\fR, amount of data reloaded from previous job\. This pa
The minimum \fIovlog\fR is 0, and the maximum is 9\. 0 means "no overlap", hence completely independent jobs\. 9 means "full overlap", meaning up to \fBwindowSize\fR is reloaded from previous job\. Reducing \fIovlog\fR by 1 reduces the amount of reload by a factor 2\. Default \fIovlog\fR is 6, which means "reload \fBwindowSize / 8\fR"\. Exception : the maximum compression level (22) has a default \fIovlog\fR of 9\.
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\fBldmHashLog\fR=\fIldmHlog\fR, \fBldmHlog\fR=\fIldmHlog\fR
\fBldmHashLog\fR=\fIldmhlog\fR, \fBldmhlog\fR=\fIldmhlog\fR
Specify the maximum size for a hash table used for long distance matching\.
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@@ -337,10 +337,10 @@ This option is ignored unless long distance matching is enabled\.
Bigger hash tables usually improve compression ratio at the expense of more memory during compression and a decrease in compression speed\.
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The minimum \fIldmHlog\fR is 6 and the maximum is 26 (default: 20)\.
The minimum \fIldmhlog\fR is 6 and the maximum is 26 (default: 20)\.
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\fBldmSearchLength\fR=\fIldmSlen\fR, \fBldmSlen\fR=\fIldmSlen\fR
\fBldmSearchLength\fR=\fIldmslen\fR, \fBldmSlen\fR=\fIldmslen\fR
Specify the minimum searched length of a match for long distance matching\.
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@@ -350,10 +350,10 @@ This option is ignored unless long distance matching is enabled\.
Larger/very small values usually decrease compression ratio\.
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The minumum \fIldmSlen\fR is 4 and the maximum is 4096 (default: 64)\.
The minumum \fIldmslen\fR is 4 and the maximum is 4096 (default: 64)\.
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\fBldmBucketSizeLog\fR=\fIldmBucketSizeLog\fR
\fBldmBucketSizeLog\fR=\fIldmblog\fR, \fBldmblog\fR=\fIldmblog\fR
Specify the size of each bucket for the hash table used for long distance matching\.
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@@ -363,10 +363,10 @@ This option is ignored unless long distance matching is enabled\.
Larger bucket sizes improve collision resolution but decrease compression speed\.
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The minimum \fIldmBucketSizeLog\fR is 0 and the maximum is 8 (default: 3)\.
The minimum \fIldmblog\fR is 0 and the maximum is 8 (default: 3)\.
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\fBldmHashEveryLog\fR=\fIldmHashEveryLog\fR
\fBldmHashEveryLog\fR=\fIldmhevery\fR, \fBldmhevery\fR=\fIldmhevery\fR
Specify the frequency of inserting entries into the long distance matching hash table\.
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@@ -376,7 +376,7 @@ This option is ignored unless long distance matching is enabled\.
Larger values will improve compression speed\. Deviating far from the default value will likely result in a decrease in compression ratio\.
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The default value is \fBwLog \- ldmHlog\fR\.
The default value is \fBwlog \- ldmhlog\fR\.
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.SS "\-B#:"
Select the size of each compression job\. This parameter is available only when multi\-threading is enabled\. Default value is \fB4 * windowSize\fR, which means it varies depending on compression level\. \fB\-B#\fR makes it possible to select a custom value\. Note that job size must respect a minimum value which is enforced transparently\. This minimum is either 1 MB, or \fBoverlapSize\fR, whichever is largest\.