NAME

       mdb_copy - LMDB environment copy tool

SYNOPSIS

       mdb_copy [-V] [-c] [-n] srcpath [dstpath]

DESCRIPTION

       The  mdb_copy  utility copies an LMDB environment. The environment can be copied regardless of whether it
       is currently in use.  No lockfile is created, since it gets recreated at need.

       If dstpath is specified it must be the path of an empty directory for storing the backup. Otherwise,  the
       backup will be written to stdout.

OPTIONS

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

       -c     Compact  while  copying.  Only  current  data  pages will be copied; freed or unused pages will be
              omitted from the copy. This option will slow down the backup process as it is more  CPU-intensive.
              Currently it fails if the environment has suffered a page leak.

       -n     Open LDMB environment(s) which do not use subdirectories.

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.

CAVEATS

       This utility can trigger significant file size growth if run in parallel with write transactions, because
       pages which they free during copying cannot be reused until the copy is done.

SEE ALSO

       mdb_stat(1)

AUTHOR

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