1MFSMETARESTORE(8)                                            MFSMETARESTORE(8)
2
3
4

NAME

6       mfsmetarestore - replay LizardFS metadata change logs or dump LizardFS
7       metadata image
8

SYNOPSIS

10       mfsmetarestore [-z] -m OLDMETADATAFILE -o NEWMETADATAFILE [CHANGELOGFILE...]
11
12       mfsmetarestore -m METADATAFILE
13
14       mfsmetarestore [-z] -a [-d DIRECTORY]
15
16       mfsmetarestore -g -d DIRECTORY
17
18       mfsmetarestore -v
19
20       mfsmetarestore -?
21

DESCRIPTION

23       When mfsmetarestore is called with both -m and -o options, it replays
24       given CHANGELOGFILEs on OLDMETADATAFILE and writes result to
25       NEWMETADATAFILE. Multiple change log files can be given.
26
27       mfsmetarestore with just -m METADATAFILE option dumps LizardFS metadata
28       image file in human readable form.
29
30       mfsmetarestore called with -a option automatically performs all
31       operations needed to merge change log files. Master data directory can
32       be specified using -d DIRECTORY option.
33
34       mfsmetarestore -g with path to metadata files, prints latest metadata
35       version that can be restored from disk. Prints 0 if metadata files are
36       corrupted.
37
38       -v
39           print version information and exit
40
41       -?
42           print version information and exit
43
44       -a
45           autorestore mode (see above)
46
47       -d DATAPATH
48           master data directory (for autorestore mode)
49
50       -m METADATAFILE
51           specify input metadata image file
52
53       -o NEWMETADATAFILE
54           specify output metadata image file
55
56       -z
57           ignore metadata checksum inconsistency while applying changelogs
58

FILES

60       metadata.mfs
61           Lizard File System metadata image as read by mfsmaster process
62
63       metadata.mfs.back
64           Lizard File System metadata image as left by killed or crashed
65           mfsmaster process
66
67       changelog.*.mfs
68           Lizard File System metadata change logs
69

REPORTING BUGS

71       Report bugs to <contact@lizardfs.org>.
72

74       Copyright 2008-2009 Gemius SA, 2013-2015 Skytechnology sp. z o.o.
75
76       LizardFS is free software: you can redistribute it and/or modify it
77       under the terms of the GNU General Public License as published by the
78       Free Software Foundation, version 3.
79
80       LizardFS is distributed in the hope that it will be useful, but WITHOUT
81       ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
82       FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
83       for more details.
84
85       You should have received a copy of the GNU General Public License along
86       with LizardFS. If not, see http://www.gnu.org/licenses/.
87

SEE ALSO

89       mfsmaster(8), moosefs(7)
90
91
92
93                                  01/26/2021                 MFSMETARESTORE(8)
Impressum