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mfsmount(8) This is part of MooseFS mfsmount(8) NAME mfsmount - mount Moose File System SYNOPSIS mfsmount [HOST[:PORT]:[PATH]] [options] mountpoint mfsmount -h|--help mfsmount -V|--version Since 3.0.75 (Linux only): mount -t moosefs [options] [HOST[:PORT]:[PATH]] mountpoint DESCRIPTION Mount Moose File System. General options: -h, --help display help and exit -V display version information and exit FUSE options: -d, -o debug enable debug mode (implies -f) -f foreground operation -s disable multi-threaded operation MooseFS options: -c CFGFILE, -o mfscfgfile=CFGFILE loads file with additional mount options -m, --meta, -o mfsmeta mount MFSMETA companion filesystem instead of primary MooseFS -n omit default mount options (-o allow_other) -p prompt for password (interactive version of -o mfspassword=PASS) -H HOST, -o mfsmaster=HOST connect with MooseFS master on HOST (default is mfsmaster) -P PORT, -o mfsport=PORT connect with MooseFS master on PORT (default is 9421) -B IP, -o mfsbind=IP local address to use for connecting with master instead of default one -L IP, -o mfsproxy=IP define listen ip address of local master proxy for communication with tools (default: 127.0.0.1) -S PATH, -o mfssubfolder=PATH mount specified MooseFS directory (default is /, i.e. whole filesys- tem) -o mfspassword=PASSWORD authenticate to MooseFS master with PASSWORD -o mfspassfile=FILENAME authenticate to MooseFS master with password stored in first line of file pointed by FILENAME -o mfsmd5pass=MD5 authenticate to MooseFS master using directly given MD5 (only if mf- spassword option is not specified) -o mfsdonotrememberpassword do not remember password in memory - more secure, but when session is lost then new session is created without password -o mfsdebug print some MooseFS-specific debugging information -o mfsmemlock try to lock memory (all allocated memory will be mapped to physical RAM - which also means no swapping) -o allowoomkiller do not disable out of memory killer (Linux only) -o mfslimitarenas=N if N>0 then limit glibc malloc arenas (Linux only - default: 4) -o mfsflattrash use flat trash structure in meta (option added for compatibility reasons - since version 3.0.64 trash is split into 4096 subfolders which reduces problems with big trashes) -o mfsdelayedinit connection with master is done in background - with this option mount can be run without network (good for being run from fstab / init scripts etc.) -o mfsmkdircopysgid=N sgid bit should be copied during mkdir operation (default depends on operating system) -o mfssugidclearmode=SMODE set sugid clear mode (see SUGID CLEAR MODES; default depends on op- erating system) -o mfscachemode=CMODE set cache mode (see DATA CACHE MODES; default is AUTO) -o mfscachefiles (deprecated) preserve file data in cache (equivalent to '-o mfs- cachemode=YES') -o mfsattrcacheto=SEC set attributes cache timeout in seconds (default: 1.0) -o mfsxattrcacheto=SEC set extended attributes (xattr) cache timeout in seconds (default: 30.0) -o mfsentrycacheto=SEC set file entry cache timeout in seconds (default: 0.0, i.e. no cache) -o mfsdirentrycacheto=SEC set directory entry cache timeout in seconds (default: 1.0) -o mfsnegentrycacheto=SEC set negative entry cache timeout in seconds (default: 0.0) -o mfssymlinkcacheto=SEC set symbolic link cache timeout in seconds (default: 300.0) -o mfsgroupscacheto=SEC set supplementary groups cache timeout in seconds (default: 300.0) -o mfsrlimitnofile=N try to change limit of simultaneously opened file descriptors on startup (default: 100000) -o mfsnice=LEVEL try to change nice level to specified value on startup (default: -19) -o mfswritecachesize=N specify write cache size in MiB (in range: 16..2048 - default: 256) -o mfsreadaheadsize=N define size of all read ahead buffers in MiB (in range: 16..2048 - default: 256) -o mfsreadaheadleng=N define amount of bytes to be additionally read (in range: 128KiB..2MiB - default: 1048576) -o mfsreadaheadtrigger=N define amount of bytes read sequentially that turns on read ahead (default: 10 * mfsreadaheadleng) -o mfserroronlostchunk when all known chunkservers are connected to the master and the re- quired chunk is missing then immediately finish I/O and return an error -o mfserroronnospace when all known chunkservers are connected to the master and there is no free space then immediately finish I/O and return an error -o mfsioretries=N specify number of retries before I/O error is returned (default: 30) -o mfstimeout=N define maximum timeout in seconds before I/O error is returned (de- fault: 0 - which means no timeout) -o mfslogretry=N define minimal retry counter on which system will start log I/O mes- sages (default: 5) -o mfsfsyncmintime=SEC force fsync before last file close when file was opened/created at least SEC seconds earlier (default: 0.0 - always do fsync before close) -o mfspreflabels=LABELEXPR specify preferred labels for choosing chunkservers during I/O -o mfsnoxattrs turn off xattr support -o mfsnoposixlocks turn off support for global posix locks (lockf + ioctl) - locks will work locally -o mfsnobsdlocks turn off support for global BSD locks (flock) - locks will work lo- cally General mount options (see mount(8) manual): -o rw|-o ro Mount file-system in read-write (default) or read-only mode respec- tively. -o suid|-o nosuid Enable or disable suid/sgid attributes to work. -o dev|-o nodev Enable or disable character or block special device files interpre- tation. -o exec|-o noexec Allow or disallow execution of binaries. SUGID CLEAR MODE During attribute change file systems sometimes clear flags suid and/or sgid. Behavior is different on different file systems. MFS tries to mimic behavior of most popular file system on given operating systems. NEVER MFS will not change suid and sgid bit on chown ALWAYS clear suid and sgid on every chown - safest operation OSX standard behavior in OS X and Solaris (chown made by unprivileged user clear suid and sgid) BSD standard behavior in *BSD systems (like in OSX, but only when some- thing is really changed) EXT standard behavior in most file systems on Linux (directories not changed, others: suid cleared always, sgid only when group exec bit is set) XFS standard behavior in XFS on Linux (like EXT but directories are changed by unprivileged users) DATA CACHE MODES There are four cache modes: DIRECT, NO, YES and AUTO. Default option is AUTO and you shuldn't change it unless you really know what you are doing. In AUTO mode data cache is managed automatically by mfsmaster. DIRECT forces direct io (bypasses cache) NO,NONE or NEVER never allow files data to be kept in cache (safest but can reduce efficiency) YES or ALWAYS always allow files data to be kept in cache (dangerous) AUTO file cache is managed by mfsmaster automatically (should be very safe and efficient) LABEL EXPRESSIONS LABELEXPR grammar: LABELEXPR -> S ; LABELEXPR | S S -> S + M | M M -> M L | L L -> a .. z | A .. Z | ( S ) | [ S ] Subexpressions should be placed in priority order. Up to nine subexpres- sions (priorities) can be specified. FSTAB On most Unix systems mfsmount can be invoked automatically from /etc/fstab. Be aware that rw or ro option has to be specified in options. Also on many systems there should be option which informs the system that this mount- point should be mounted after starting networking services (options such as _netdev or late). Linux: mfsmount mountpoint fuse options 0 0 *BSD: mfsmount_magic mountpoint moosefs options,mountprog=/usr/local/bin/mfsmount 0 0 Since version 3.0.75 alternative form can be used: Linux: HOST[:PORT]:[PATH] mountpoint moosefs options 0 0 *BSD: HOST[:PORT]:[PATH] mountpoint moosefs options,mountprog=/usr/local/bin/mfs- mount 0 0 REPORTING BUGS Report bugs to <bugs@moosefs.com>. COPYRIGHT Copyright (C) 2024 Jakub Kruszona-Zawadzki, Saglabs SA 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 Soft- ware 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 de- tails. 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), mfstools(1), mount(8) MooseFS 3.0.118-1 August 2024 mfsmount(8)
NAME | SYNOPSIS | DESCRIPTION | SUGID CLEAR MODE | DATA CACHE MODES | LABEL EXPRESSIONS | FSTAB | REPORTING BUGS | COPYRIGHT | SEE ALSO
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