Lines Matching full:zstd

1 zstd(1) -- zstd, zstdmt, unzstd, zstdcat - Compress or decompress .zst files
7 `zstd` [*OPTIONS*] [-|_INPUT-FILE_] [-o _OUTPUT-FILE_]
9 `zstdmt` is equivalent to `zstd -T0`
11 `unzstd` is equivalent to `zstd -d`
13 `zstdcat` is equivalent to `zstd -dcf`
18 `zstd` is a fast lossless compression algorithm and data compression tool,
21 `zstd` offers highly configurable compression speed,
26 `zstd` command line syntax is generally similar to gzip,
31   - When compressing a single file, `zstd` displays progress notifications
34   - `zstd` does not accept input from console,
36   - `zstd` displays a short help page when command line is an error.
39 `zstd` compresses or decompresses each _file_ according to the selected
41 If no _files_ are given or _file_ is `-`, `zstd` reads from standard input
43 `zstd` will refuse to write compressed data to standard output
45 Similarly, `zstd` will refuse to read compressed data from standard input
58 `zstd` will decompress such files as if they were a single `.zst` file.
97     Display information related to a zstd compressed file, such as size, ratio, and checksum.
120     This modifier does nothing if `zstd` is compiled without multithread support.
132     `zstd` will dynamically adapt compression level to perceived I/O conditions.
154     Specify the file to be used as a reference point for zstd's diff engine.
165         of speed by specifying `--zstd=targetLength=` to be something large
166         (i.e 4096), and by setting a large `--zstd=chainLog=`
168     `zstd` will periodically synchronize the compression state to make the
195     overrides the default limit of 2 GB. zstd will load training samples up to the memory limit
203     When handling input from a stream, `zstd` must guess how large the source size
258     support, zstd can compress to or decompress from other compression algorithm
259     formats. Possibly available options are `zstd`, `gzip`, `xz`, `lzma`, and `lz4`.
260     If no such format is provided, `zstd` is the default.
294 `ZSTD_NBTHREADS` can be used to set the number of threads `zstd` will attempt to use during compres…
296 `ZSTD_NBTHREADS` has a default value of (`1`), and is capped at ZSTDMT_NBWORKERS_MAX==200. `zstd` m…
305 `zstd` offers _dictionary_ compression,
307 It's possible to train `zstd` with a set of samples,
321     `--train` supports multithreading if `zstd` is compiled with threading support (default).
341     By default, zstd will create a 4-bytes random number ID.
367     Supports multithreading if `zstd` is compiled with threading support.
374     `zstd --train-cover FILEs`
376     `zstd --train-cover=k=50,d=8 FILEs`
378     `zstd --train-cover=d=8,steps=500 FILEs`
380     `zstd --train-cover=k=50 FILEs`
382     `zstd --train-cover=k=50,split=60 FILEs`
384     `zstd --train-cover=shrink FILEs`
386     `zstd --train-cover=shrink=2 FILEs`
404     `zstd --train-fastcover FILEs`
406     `zstd --train-fastcover=d=8,f=15,accel=2 FILEs`
417     `zstd --train-legacy FILEs`
419     `zstd --train-legacy=selectivity=8 FILEs`
452 ### --zstd[=options]:  argument
453 `zstd` provides 22 predefined compression levels.
465     1=ZSTD\_fast, 2=ZSTD\_dfast, 3=ZSTD\_greedy,
466     4=ZSTD\_lazy, 5=ZSTD\_lazy2, 6=ZSTD\_btlazy2,
467     7=ZSTD\_btopt, 8=ZSTD\_btultra, 9=ZSTD\_btultra2.
521     For ZSTD\_btopt, ZSTD\_btultra and ZSTD\_btultra2, it specifies
526     For ZSTD\_fast, it triggers ultra-fast mode when > 0.
545     Value 0 is special and means "default" : _ovlog_ is automatically determined by `zstd`.
593 `--zstd`=wlog=23,clog=23,hlog=22,slog=6,mml=3,tlen=48,strat=6
598 Report bugs at: https://github.com/facebook/zstd/issues