Provided by: libcmph-tools_2.0-2build1_amd64
cmph - minimum perfect hashing tool
cmph [-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
Command line tool to generate and query minimal perfect hash functions. Please refer to http://cmph.sf.net for full documentation. -h Print an help message -c 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 -a Algorithm. Valid values are: bmz, bmz8, chm, brz, fch -f hash function (may be used multiple times). valid values are: djb2, fnv, jenkins, sdbm -V Print version number and exit -v Increase verbosity (may be used multiple times) -k Number of keys -g Generation mode -s Random seed -m Minimum perfect hash function file -M Main memory availability (in MB) -d Temporary directory used in brz algorithm -b Parameter of BRZ algorithm to make the maximal number of keys in a bucket lower than 256 keysfile Line separated file with keys
$ # Using the default algorithm (chm) for constructing a mphf $ # for keys in file keys_file. Lines in keys_file _must_ be unique. $ ./cmph -v -g keys_file $ # Query id of keys in the file keys_query $ ./cmph -v -m keys_file.mph keys_query
This manual page was written by Enrico Tassi <email@example.com>, for the Debian project (but may be used by others).