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mfsmetarestore - replay LizardFS metadata change logs or dump LizardFS metadata

MFSMETARESTORE(8)   MFSMETARESTORE(8)

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 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)
09/10/2017