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mdb_copy - Online in the Cloud

Run mdb_copy in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command mdb_copy that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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.

-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.

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