NAME

       map_db  -  read  a FASTA (0), GENBANK flat file (1) PIR/VMS (5) or GCG binary (6) sequence
       database and produce the offsets necessary for efficient memory mapping.

SYNOPSIS

       map_db [-n] filename | "filename libtype"

DESCRIPTION

       map_db  filename  reads  the  sequence  database  in  filename  and  produce  a  new  file
       filename.xin with the offset information necessary for efficient memory mapping.

       The  programs  in  fasta version 32t08 can use memory mapped i/o to load sequence database
       files and read them efficiently.  Memory  mapping  is  used  only  if  a  ".xin"  file  is
       available.  The ".xin" file is created by map_db.

       In  addition to map_db, list_db is available to display the database size, etc, and set of
       offsets calculated by map_db.

OPTIONS

       -n     Read file as DNA database.

BUGS

AUTHOR

       Bill Pearson
       wrp@virginia.EDU

                                                                          MAP_DB(September, 1999)