Provided by: moosefs-master_3.0.116-1ubuntu2_amd64 
NAME
mfsmetadump - dump MooseFS metadata info in human readable format
SYNOPSIS
mfsmetadump [-d] [-s section_name] metadata_file
DESCRIPTION
mfsmetadump dumps MooseFS metadata info in human readable format. Output consists of
several sections with different types of information. Every section consist of header data
- rows starting with hash (#) sign - and content data (may be empty).
OPTIONS
-d - replace all non-printable characters (codes < 32 and > 126) with '.' (it was default
behaviour in version < 3.0.110).
-s - dump only specified section of the file. Possible sections:
HEAD - header info
SESS - client sessions
LABS - labels (not used)
SCLA - storage classes
NODE - tree nodes (i-nodes)
EDGE - tree edges (file names)
FREE - free nodes (deleted i-nodes)
QUOT - quota definitions
XATR - xattr data
PACL - posix acl data
OPEN - open files
FLCK - flock data
PLCK - posix locks (lockf,ioctl) data
CSDB - active chunkservers
CHNK - chunks
SECTION HEADER (precedes each section except HEAD)
section header section header (section type + version)
length length of section
section type name of section
version hexadecimal representation of section version
FILE HEADER (HEAD)
header MooseFS version
version metadata file version
fileid metadata file id
SESSIONS SECTION (SESS)
nextsessionid first free session id
statscount number of stats remembered in each session
SESSION line describing a single session
s session id
e exports checksum
p IP address
r root inode number
f session flags
u umask
g min and max goal (redundancy level)
t min and max trash retention
m maproot uid,gid and mapall uid,gid
x disabled operations
d disconnection time (optional)
c current hour stats data
l last hour stats data
i session name (usually local mount point)
STORAGE CLASS SECTION (SCLA), formerly LABELS SECTION (LABS)
LABELDESC line with label description (existed only in LABS)
l label letter
n label description
SCLASS (formerly LABELSET) line with storage class used in system
# storage class id
x admin only
m mode
d arch delay
c create labels
k keep labels
a archive labels
n name
NODES SECTION (NODE)
maxinode maximum inode number used by system
hashelements number of inodes in hash tabble
NODE line with node (inode) description
k node type (-,D,S,F,B,C,L,T,R)
- file
D directory
S socket
F fifo
B block device
C character device
L symbolic link
T trash file
R sustained file (removed open file)
i inode number
# storage class id
e flags (extra mfs attributes)
w windows attributes
m mode
u uid
g gid
a,m,c atime, mtime, ctime
t trash retention
d rdevhi,rdevlo (only block and character devices)
p path (only symbolic links)
l file length (only files)
c chunk list (only files)
r sessions that have this file open (only files)
EDGES SECTION (EDGE)
nextedgeid next available edge id (descending)
EDGE line with edge description
p parent inode number
c child inode number
i edge id
n edge name
FREE NODES SECTION (FREE)
free nodes number of free (reusable) nodes
FREEID line with free inode description
i inode number
f deletion timestamp
QUOTA SECTION (QUOT)
quota nodes number of nodes with quota
QUOTA line with quota description
i inode number
g grace period
e exceeded
f flags
s soft quota exceeded timestamp
si soft inode quota
hi hard inode quota
sl soft length quota
hl hard length quota
ss soft size quota
hs hard size quota
sr soft real size quota
hr hard real size quota
XATTR SECTION (XATR)
XATTR line with xattr description
i inode number
n xattr name
v xattr value
POSIX ACL SECTION (PACL)
POSIXACL line with acl description
i inode number
t acl type
u user (file owner) permissions
g group permissions
o other permissions
m permission mask
n named permissions - list of objects:
u(U):P permissions P for user with uid U
g(G):P permissions P for group with gid G
OPEN FILES SECTION (OPEN)
OPENFILE line with open file description
s session id
i inode number
FLOCK LOCK SECTION (FLCK)
FLOCK line with flock-lock description
i inode number
s session id
o lock owner (FUSE lock owner)
t lock type ('R' - shared lock, 'W' - exclusive lock)
POSIX LOCK SECTION (PLCK)
POSIXLOCK line with posix-lock description
i inode number
s session id
o lock owner (FUSE lock owner)
p local process id (owner pid)
r lock range in format <START,END)
t lock type ('R' - shared lock, 'W' - exclusive lock)
CHUNKSERVERS SECTION (CSDB)
chunk servers number of chunkservers
CHUNCKSERVER line with chunk server description
i server ip
p server port
# server id
m maintenance mode
t maintenance timeout timestamp
CHUNKS SECTION (CHNK)
nextchunkid first available chunk number
CHUNK line with chunk description
i chunk number
v chunk version
t "locked to" timestamp
a archive flag
REPORTING BUGS
Report bugs to <bugs@moosefs.com>.
COPYRIGHT
Copyright (C) 2021 Jakub Kruszona-Zawadzki, Core Technology Sp. z o.o.
This file is part of MooseFS.
MooseFS 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 2 (only).
MooseFS 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 MooseFS; if
not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02111-1301, USA or visit http://www.gnu.org/licenses/gpl-2.0.html
SEE ALSO
mfsmaster(8)