68 lines
1.7 KiB
Groff
68 lines
1.7 KiB
Groff
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.TH CMPH "1" "October 2007" "cmph 0.6" "User Commands"
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.SH NAME
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cmph \- minimum perfect hashing tool
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.SH SYNOPSIS
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.B cmph
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[-v] [-h] [-V] [-k nkeys] [-f hash_function] [-g [-c value][-s seed] ] [-a algorithm] [-M memory_in_MB] [-b BRZ_parameter] [-d tmp_dir] [-m file.mph] keysfile
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.SH DESCRIPTION
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.PP
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Command line tool to generate and query minimal perfect hash functions.
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.PP
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Please refer to http://cmph.sf.net for full documentation.
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.TP
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\fB\-h\fR
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Print an help message
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.TP
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\fB\-c\fR
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This value determines: the number of vertices in the graph for the algorithms BMZ and CHM; the number of bits per key required in the FCH algorithm
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.TP
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\fB\-a\fR
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Algorithm. Valid values are: bmz, bmz8, chm, brz, fch
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.TP
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\fB\-f\fR
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hash function (may be used multiple times). valid values are: djb2, fnv, jenkins, sdbm
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.TP
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\fB\-V\fR
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Print version number and exit
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.TP
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\fB\-v\fR
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Increase verbosity (may be used multiple times)
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.TP
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\fB\-k\fR
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Number of keys
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.TP
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\fB\-g\fR
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Generation mode
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.TP
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\fB\-s\fR
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Random seed
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.TP
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\fB\-m\fR
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Minimum perfect hash function file
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.TP
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\fB\-M\fR
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Main memory availability (in MB)
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.TP
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\fB\-d\fR
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Temporary directory used in brz algorithm
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.TP
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\fB\-b\fR
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Parameter of BRZ algorithm to make the maximal number of keys in a bucket lower than 256
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.TP
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\fBkeysfile\fR
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Line separated file with keys
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.SH EXAMPLE
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$ # Using the default algorithm (chm) for constructing a mphf
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.br
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$ # for keys in file keys_file. Lines in keys_file _must_ be unique.
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.br
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$ ./cmph -v -g keys_file
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.br
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$ # Query id of keys in the file keys_query
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.br
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$ ./cmph -v -m keys_file.mph keys_query
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.SH AUTHOR
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This manual page was written by Enrico Tassi <gareuselesinge@users.sourceforge.net>,
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for the Debian project (but may be used by others).
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