NAME

       mfsmetarestore - replay LizardFS metadata change logs or dump LizardFS metadata image

SYNOPSIS

       mfsmetarestore [-z] -m OLDMETADATAFILE -o NEWMETADATAFILE [CHANGELOGFILE...]

       mfsmetarestore -m METADATAFILE

       mfsmetarestore [-z] -a [-d DIRECTORY]

       mfsmetarestore -g -d DIRECTORY

       mfsmetarestore -v

       mfsmetarestore -?

DESCRIPTION

       When mfsmetarestore is called with both -m and -o options, it replays given CHANGELOGFILEs
       on OLDMETADATAFILE and writes result to NEWMETADATAFILE. Multiple change log files can be
       given.

       mfsmetarestore with just -m METADATAFILE option dumps LizardFS metadata image file in
       human readable form.

       mfsmetarestore called with -a option automatically performs all operations needed to merge
       change log files. Master data directory can be specified using -d DIRECTORY option.

       mfsmetarestore -g with path to metadata files, prints latest metadata version that can be
       restored from disk. Prints 0 if metadata files are corrupted.

       -v
           print version information and exit

       -?
           print version information and exit

       -a
           autorestore mode (see above)

       -d DATAPATH
           master data directory (for autorestore mode)

       -m METADATAFILE
           specify input metadata image file

       -o NEWMETADATAFILE
           specify output metadata image file

       -z
           ignore metadata checksum inconsistency while applying changelogs

FILES

       metadata.mfs
           Lizard File System metadata image as read by mfsmaster process

       metadata.mfs.back
           Lizard File System metadata image as left by killed or crashed mfsmaster process

       changelog.*.mfs
           Lizard File System metadata change logs

REPORTING BUGS

       Report bugs to <contact@lizardfs.org>.

COPYRIGHT

       Copyright 2008-2009 Gemius SA, 2013-2015 Skytechnology sp. z o.o.

       LizardFS is free software: you can redistribute it and/or modify it under the terms of the
       GNU General Public License as published by the Free Software Foundation, version 3.

       LizardFS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with LizardFS. If
       not, see http://www.gnu.org/licenses/.

SEE ALSO

       mfsmaster(8), moosefs(7)

                                            02/11/2018                          MFSMETARESTORE(8)