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1 of 2 for https://github.com/ReOpen/libmdbx/issues/3 Change-Id: I7a0b820e092e7b0064ae22341bebcd015e37b7c7
96 lines
3.0 KiB
Groff
96 lines
3.0 KiB
Groff
.\" Copyright (c) 2015,2016 Leonid Yuriev <leo@yuriev.ru>.
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.\" Copyright (c) 2015,2016 Peter-Service R&D LLC <http://billing.ru/>.
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.\"
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.\" This file is part of ReOpenMDBX.
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.\"
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.\" ReOpenMDBX is free software; you can redistribute it and/or modify it under
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.\" the terms of the GNU Affero General Public License as published by
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.\" the Free Software Foundation; either version 3 of the License, or
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.\" (at your option) any later version.
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.\"
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.\" ReOpenMDBX is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU Affero General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU Affero General Public License
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.\" along with this program. If not, see <http://www.gnu.org/licenses/>.
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.\"
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.\" ---
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.\"
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.\" Copyright 2014-2016 Howard Chu, Symas Corp. All Rights Reserved.
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.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
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.TH MDB_DUMP 1 "2014/06/20" "LMDB 0.9.14"
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.SH NAME
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mdb_dump \- LMDB environment export tool
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.SH SYNOPSIS
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.B mdb_dump
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[\c
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.BR \-V ]
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[\c
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.BI \-f \ file\fR]
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[\c
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.BR \-l ]
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[\c
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.BR \-n ]
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[\c
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.BR \-p ]
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[\c
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.BR \-a \ |
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.BI \-s \ subdb\fR]
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.BR \ envpath
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.SH DESCRIPTION
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The
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.B mdb_dump
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utility reads a database and writes its contents to the
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standard output using a portable flat-text format
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understood by the
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.BR mdb_load (1)
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utility.
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.SH OPTIONS
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.TP
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.BR \-V
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Write the library version number to the standard output, and exit.
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.TP
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.BR \-f \ file
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Write to the specified file instead of to the standard output.
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.TP
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.BR \-l
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List the databases stored in the environment. Just the
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names will be listed, no data will be output.
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.TP
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.BR \-n
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Dump an LMDB database which does not use subdirectories.
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.TP
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.BR \-p
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If characters in either the key or data items are printing characters (as
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defined by isprint(3)), output them directly. This option permits users to
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use standard text editors and tools to modify the contents of databases.
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Note: different systems may have different notions about what characters
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are considered printing characters, and databases dumped in this manner may
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be less portable to external systems.
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.TP
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.BR \-a
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Dump all of the subdatabases in the environment.
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.TP
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.BR \-s \ subdb
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Dump a specific subdatabase. If no database is specified, only the main database is dumped.
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.SH DIAGNOSTICS
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Exit status is zero if no errors occur.
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Errors result in a non-zero exit status and
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a diagnostic message being written to standard error.
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Dumping and reloading databases that use user-defined comparison functions
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will result in new databases that use the default comparison functions.
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\fBIn this case it is quite likely that the reloaded database will be
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damaged beyond repair permitting neither record storage nor retrieval.\fP
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The only available workaround is to modify the source for the
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.BR mdb_load (1)
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utility to load the database using the correct comparison functions.
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.SH "SEE ALSO"
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.BR mdb_load (1)
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.SH AUTHOR
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Howard Chu of Symas Corporation <http://www.symas.com>
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