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 the -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. The master data directory can be specified using -d DIRECTORY option.

mfsmetarestore -g with path to metadata files, prints the latest metadata version that can be restored from disk.

Prints 0 if metadata files are corrupted.

`-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
`-v`	print version information and exit

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¶

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/>.