mg_perf_hash_build(1)

NAME
mg_perf_hash_build - generate an order-preserving hash function for the stemmed dictionary

SYNOPSIS
mg_perf_hash_build [ -h ] [ -r rndseed ] [ -d directory ]
-f name

DESCRIPTION
mg_perf_hash_build generates an order-preserving hashing function from the compressed stemmed dictionary and writes it out to disk. mg_passes(1) will make use of the hash function when it builds the inverted file.

OPTIONS
Options may appear in any order.

-h  This displays a usage line on stderr.

-r rndseed
    This specifies the random seed to be used in the generation of the hash function; it must be an integer. If this is not specified, the current time will be used as the random seed.

-d directory
    This specifies the directory where the document collection can be found.

-f name
    This specifies the base name of the document collection.

ENVIRONMENT

MGDATA
    If this environment variable exists, then its value is used as the default directory where the mg(1) collection files are. If this variable does not exist, then the directory “.” is used by default. The command line option -d directory overrides the directory in MGDATA.

FILES

*.invf.dict
    Stemmed dictionary.

*.invf.dict.hash
    Data for a order-preserving perfect hash function.

SEE ALSO
mg(1), mg_compression_dict(1), mg_fast_comp_dict(1), mg_get(1), mg_invf_dict(1), mg_invf_dump(1), mg_invf_rebuild(1), mg_passes(1), mg_text_estimate(1), mg_weights_build(1), mgbilevel(1), mgbuild(1), mgdictlist(1), mgfelics(1), mgquery(1), mgstat(1), mgtic(1), mgticbuild(1), mgticdump(1), mgticprune(1), mgticstat(1).