Lines Matching +full:zstd +full:- +full:src

2 .TH "ZSTD" "1" "January 2022" "zstd 1.5.2" "User Commands"
5 \fBzstd\fR \- zstd, zstdmt, unzstd, zstdcat \- Compress or decompress \.zst files
8 \fBzstd\fR [\fIOPTIONS\fR] [\-|\fIINPUT\-FILE\fR] [\-o \fIOUTPUT\-FILE\fR]
11 \fBzstdmt\fR is equivalent to \fBzstd \-T0\fR
14 \fBunzstd\fR is equivalent to \fBzstd \-d\fR
17 \fBzstdcat\fR is equivalent to \fBzstd \-dcf\fR
20 …zstd\fR is a fast lossless compression algorithm and data compression tool, with command line synt…
23 \fBzstd\fR command line syntax is generally similar to gzip, but features the following differences…
26 …served by default\. It\'s possible to remove them automatically by using the \fB\-\-rm\fR command\.
29 When compressing a single file, \fBzstd\fR displays progress notifications and result summary by de…
32 \fBzstd\fR does not accept input from console, but it properly accepts \fBstdin\fR when it\'s not t…
35 \fBzstd\fR displays a short help page when command line is an error\. Use \fB\-q\fR to turn it off\.
40 …zstd\fR compresses or decompresses each \fIfile\fR according to the selected operation mode\. If n…
43 Unless \fB\-\-stdout\fR or \fB\-o\fR is specified, \fIfiles\fR are written to a new file whose name…
54 It is possible to concatenate \fB\.zst\fR files as is\. \fBzstd\fR will decompress such files as if…
73 \fB\-z\fR, \fB\-\-compress\fR
74 …on mode is implied from the command name (for example, \fBunzstd\fR implies \fB\-\-decompress\fR)\.
77 \fB\-d\fR, \fB\-\-decompress\fR, \fB\-\-uncompress\fR
81 \fB\-t\fR, \fB\-\-test\fR
82 Test the integrity of compressed \fIfiles\fR\. This option is equivalent to \fB\-\-decompress \-\-s…
85 \fB\-b#\fR
89 \fB\-\-train FILEs\fR
93 \fB\-l\fR, \fB\-\-list\fR
94 … a zstd compressed file, such as size, ratio, and checksum\. Some of these fields may not be avail…
99 \fB\-#\fR: \fB#\fR compression level [1\-19] (default: 3)
102 \fB\-\-ultra\fR: unlocks high compression levels 20+ (maximum 22), using a lot more memory\. Note t…
105 …-\-fast[=#]\fR: switch to ultra\-fast compression levels\. If \fB=#\fR is not present, it defaults…
108 …-T#\fR, \fB\-\-threads=#\fR: Compress using \fB#\fR working threads (default: 1)\. If \fB#\fR is 0…
111 …-\-single\-thread\fR: Does not spawn a thread for compression, use a single thread for both I/O an…
114 \fB\-\-auto\-threads={physical,logical} (default: physical)\fR: When using a default amount of thre…
117 …-\-adapt[=min=#,max=#]\fR : \fBzstd\fR will dynamically adapt compression level to perceived I/O c…
120 \fB\-\-long[=#]\fR: enables long distance matching with \fB#\fR \fBwindowLog\fR, if not \fB#\fR is …
123 Note: If \fBwindowLog\fR is set to larger than 27, \fB\-\-long=windowLog\fR or \fB\-\-memory=window…
126 \fB\-D DICT\fR: use \fBDICT\fR as Dictionary to compress or decompress FILE(s)
129 \fB\-\-patch\-from FILE\fR: Specify the file to be used as a reference point for zstd\'s diff engin…
132 …-D together Note: \fB\-\-long\fR mode will be automatically activated if chainLog < fileLog (fileL…
135 …-\-rsyncable\fR : \fBzstd\fR will periodically synchronize the compression state to make the compr…
138 \fB\-C\fR, \fB\-\-[no\-]check\fR: add integrity check computed from uncompressed data (default: ena…
141 …-\-[no\-]content\-size\fR: enable / disable whether or not the original size of the file is placed…
144 \fB\-\-no\-dictID\fR: do not store dictionary ID within frame header (dictionary compression)\. The…
147 \fB\-M#\fR, \fB\-\-memory=#\fR: Set a memory usage limit\. By default, Zstandard uses 128 MB for de…
150 This is also used during compression when using with \-\-patch\-from=\. In this case, this paramete…
153 …ictionary training\. This parameter overrides the default limit of 2 GB\. zstd will load training …
156 \fB\-\-stream\-size=#\fR : Sets the pledged source size of input coming from a stream\. This value …
159 \fB\-\-size\-hint=#\fR: When handling input from a stream, \fBzstd\fR must guess how large the sour…
162 \fB\-o FILE\fR: save result into \fBFILE\fR
165 \fB\-f\fR, \fB\-\-force\fR: disable input and output checks\. Allows overwriting existing files, in…
168 \fB\-c\fR, \fB\-\-stdout\fR: write to standard output (even if it is the console)
171 \fB\-\-[no\-]sparse\fR: enable / disable sparse FS support, to make files with many zeroes smaller …
174 …-\-rm\fR: remove source file(s) after successful compression or decompression\. If used in combina…
177 \fB\-k\fR, \fB\-\-keep\fR: keep source file(s) after successful compression or decompression\. This…
180 \fB\-r\fR: operate recursively on directories\. It selects all files in the named directory and all…
183 \fB\-\-filelist FILE\fR read a list of files to process as content from \fBFILE\fR\. Format is comp…
186 …-\-output\-dir\-flat DIR\fR: resulting files are stored into target \fBDIR\fR directory, instead o…
189 \fB\-\-output\-dir\-mirror DIR\fR: similar to \fB\-\-output\-dir\-flat\fR, the output files are sto…
192 …ut\-dir/var/tmp/abc"\. If there are multiple input files or directories, name collision resolution…
195 …-\-format=FORMAT\fR: compress and decompress in other formats\. If compiled with support, zstd can…
198 \fB\-h\fR/\fB\-H\fR, \fB\-\-help\fR: display help/long help and exit
201 …-V\fR, \fB\-\-version\fR: display version number and exit\. Advanced : \fB\-vV\fR also displays su…
204 \fB\-v\fR, \fB\-\-verbose\fR: verbose mode, display more information
207 \fB\-q\fR, \fB\-\-quiet\fR: suppress warnings, interactivity, and notifications\. specify twice to …
210 \fB\-\-no\-progress\fR: do not display the progress bar, but keep all other messages\.
213 …-\-show\-default\-cparams\fR: Shows the default compression parameters that will be used for a par…
216 \fB\-\-\fR: All arguments after \fB\-\-\fR are treated as files
227 …zstd\fR will attempt to use during compression\. If the value of \fBZSTD_NBTHREADS\fR is not a val…
230 …e overridden by corresponding command line arguments: \fB\-#\fR for compression level and \fB\-T#\…
233 …zstd\fR offers \fIdictionary\fR compression, which greatly improves efficiency on small files and …
236 \fB\-\-train FILEs\fR
237 … size (for example, 10 MB for a 100 KB dictionary)\. \fB\-\-train\fR can be combined with \fB\-r\f…
240 …-\-train\fR supports multithreading if \fBzstd\fR is compiled with threading support (default)\. A…
243 \fB\-o file\fR
247 \fB\-\-maxdict=#\fR
251 \fB\-#\fR
255 \fB\-B#\fR
259 \fB\-M#\fR, \fB\-\-memory=#\fR
263 \fB\-\-dictID=#\fR
264 …can use to verify it is using the right dictionary\. By default, zstd will create a 4\-bytes rando…
267 \fB\-\-train\-cover[=k#,d=#,steps=#,split=#,shrink[=#]]\fR
271 …l \fId\fR and \fIk\fR to build dictionary\. Supports multithreading if \fBzstd\fR is compiled with…
277 \fBzstd \-\-train\-cover FILEs\fR
280 \fBzstd \-\-train\-cover=k=50,d=8 FILEs\fR
283 \fBzstd \-\-train\-cover=d=8,steps=500 FILEs\fR
286 \fBzstd \-\-train\-cover=k=50 FILEs\fR
289 \fBzstd \-\-train\-cover=k=50,split=60 FILEs\fR
292 \fBzstd \-\-train\-cover=shrink FILEs\fR
295 \fBzstd \-\-train\-cover=shrink=2 FILEs\fR
298 \fB\-\-train\-fastcover[=k#,d=#,f=#,steps=#,split=#,accel=#]\fR
302 …e \fId\fR\. The subsegment is hashed to an index in the range [0,2^\fIf\fR \- 1]\. It is possible …
308 \fBzstd \-\-train\-fastcover FILEs\fR
311 \fBzstd \-\-train\-fastcover=d=8,f=15,accel=2 FILEs\fR
314 \fB\-\-train\-legacy[=selectivity=#]\fR
315 … improving its efficiency but reducing its possible maximum size\. \fB\-\-train\-legacy=s=#\fR is …
321 \fBzstd \-\-train\-legacy FILEs\fR
324 \fBzstd \-\-train\-legacy=selectivity=8 FILEs\fR
329 \fB\-b#\fR
333 \fB\-e#\fR
334 benchmark file(s) using multiple compression levels, from \fB\-b#\fR to \fB\-e#\fR (inclusive)
337 \fB\-i#\fR
341 \fB\-B#\fR, \fB\-\-block\-size=#\fR
345 \fB\-\-priority=rt\fR
346 set process priority to real\-time
349 \fBOutput Format:\fR CompressionLevel#Filename : IntputSize \-> OutputSize (CompressionRatio), Comp…
352 …ion and decompression speed, the entire input is compressed/decompressed in\-memory to measure spe…
356 .SS "\-B#:"
357 …-threading is enabled\. Each compression job is run in parallel, so this value indirectly impacts …
359 .SS "\-\-zstd[=options]:"
360 …zstd\fR provides 22 predefined compression levels\. The selected or default predefined compression…
374 …wlog\fR is 10 (1 KiB) and the maximum is 30 (1 GiB) on 32\-bit platforms and 31 (2 GiB) on 64\-bit…
377 Note: If \fBwindowLog\fR is set to larger than 27, \fB\-\-long=windowLog\fR or \fB\-\-memory=window…
397 …clog\fR is 6 (64 B) and the maximum is 29 (524 Mib) on 32\-bit platforms and 30 (1 Gib) on 64\-bit…
407 The minimum \fIslog\fR is 1 and the maximum is \'windowLog\' \- 1\.
424 … ratio but decreases compression speed\. t For ZSTD_fast, it triggers ultra\-fast mode when > 0\. …
437 …ecial and means "default" : \fIovlog\fR is automatically determined by \fBzstd\fR\. In which case,…
489 The default value is \fBwlog \- lhlog\fR\.
495 \fB\-\-zstd\fR=wlog=23,clog=23,hlog=22,slog=6,mml=3,tlen=48,strat=6
498 Report bugs at: https://github\.com/facebook/zstd/issues