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>