.SH NAME
mdb_copy \- LMDB environment copy tool
.SH SYNOPSIS
-.B mdb_stat
-.I srcpath\ dstpath
+.B mdb_copy
+.I srcpath\ [dstpath]
.SH DESCRIPTION
The
.B 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
+.I dstpath
+is specified it must be the path of an empty directory
+for storing the backup. Otherwise, the backup will be
+written to stdout.
+
.SH 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.
+.SH 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.
.SH "SEE ALSO"
.BR mdb_stat (1)
.SH AUTHOR