NAME

       mdb_dump - LMDB environment export tool

SYNOPSIS

       mdb_dump [-V] [-f file] [-l] [-n] [-p] [-a | -s subdb]  envpath

DESCRIPTION

       The mdb_dump utility reads a database and writes its contents to the standard output using
       a portable flat-text format understood by the mdb_load(1) utility.

OPTIONS

       -V     Write the library version number to the standard output, and exit.

       -f file
              Write to the specified file instead of to the standard output.

       -l     List the databases stored in the environment. Just the names  will  be  listed,  no
              data will be output.

       -n     Dump an LMDB database which does not use subdirectories.

       -p     If  characters  in either the key or data items are printing characters (as defined
              by isprint(3)), output them directly. This option permits  users  to  use  standard
              text editors and tools to modify the contents of databases.

              Note:  different  systems  may  have  different  notions  about what characters are
              considered printing characters, and databases dumped in this  manner  may  be  less
              portable to external systems.

       -a     Dump all of the subdatabases in the environment.

       -s subdb
              Dump a specific subdatabase. If no database is specified, only the main database is
              dumped.

DIAGNOSTICS

       Exit status is zero if no errors occur.  Errors result in a non-zero  exit  status  and  a
       diagnostic message being written to standard error.

       Dumping  and reloading databases that use user-defined comparison functions will result in
       new databases that use the default comparison functions.  In this case it is quite  likely
       that the reloaded database will be damaged beyond repair permitting neither record storage
       nor retrieval.

       The only available workaround is to modify the source for the mdb_load(1) utility to  load
       the database using the correct comparison functions.

SEE ALSO

       mdb_load(1)

AUTHOR

       Howard Chu of Symas Corporation <http://www.symas.com>