mfsgoal "1" "August 2021" "MooseFS 3.0.116-1" "This is part of MooseFS"
NAME
mfsgoal -
MooseFS goal management tools
SYNOPSIS
mfsgetgoal [
-r] [
-n|
-h|
-H|
-k|
-m|
-g]
OBJECT...
mfssetgoal [-r] [-n|-h|-H|-k|-m|-g] GOAL[+|-] OBJECT...
mfscopygoal [-r] [-n|-h|-H|-k|-m|-g] SOURCE_OBJECT OBJECT...
mfsrgetgoal [-n|-h|-H|-k|-m|-g] OBJECT...
mfsrsetgoal [-n|-h|-H|-k|-m|-g] GOAL[+|-] OBJECT...
DESCRIPTION
These tools operate on object's
goal value,
i.e. the number of copies in which all file data are stored. It means that
file should survive failure of one less chunkservers than its
goal
value.
Goal must be set between 1 and 9 (note that 1 is strongly
unadvised).
mfsgetgoal prints current goal value of given object(s).
-r option enables recursive mode, which works as usual for every
given file, but for every given directory additionally prints current
goal value of all contained objects (files and directories).
mfssetgoal changes current goal value of given object(s). If new
value is specified in N+ form, goal value is increased to
N for objects with lower goal value and unchanged for the rest.
Similarly, if new value is specified as N-, goal value is
decreased to N for objects with higher goal value and unchanged
for the rest. -r option enables recursive mode.
These tools can be used on any file, directory or deleted (trash) file.
mfscopygoal tool can be used to copy goal value from one object to another.
mfsrgetgoal and mfsrsetgoal are deprecated aliases for
mfsgetgoal -r and mfssetgoal -r respectively.
STORAGE CLASSES
Since version 3.0 of MooseFS goal has been extended to storage classes.
Using storage classes user can also specify chunkservers on which copies should be stored
by defining label expressions. To maintain compatibility with standard goal semantics, there are
predefined storage classes from 1 to 9. Goal tools simply work only on these classes.
To achieve more sophisticated storage scenarios use sclass tools (
mfsgetsclass,
mfssetsclass,...)
GENERAL OPTIONS
Most of
mfstools use
-n,
-h,
-H,
-k,
-m and
-g
options to select
format of printed numbers.
-n causes to print exact numbers,
-h
uses binary prefixes (Ki, Mi, Gi as 2^10, 2^20 etc.) while
-H uses SI
prefixes (k, M, G as 10^3, 10^6 etc.).
-k,
-m and
-g show plain numbers
respectivaly in kibis (binary kilo - 1024), mebis (binary mega - 1024^2)
and gibis (binary giga - 1024^3).
The same can be achieved by setting
MFSHRFORMAT environment variable to:
0 (exact numbers),
1
or
h (binary prefixes),
2 or
H (SI prefixes),
3 or
h+ (exact numbers and binary prefixes),
4 or
H+ (exact
numbers and SI prefixes). The default is to print just exact numbers.
INHERITANCE
When new object is created in MooseFS, attributes such as storage class, trashtime and extra
attributes are inherited from parent directory. So if you set i.e. "noowner"
attribute and storage class to "important" in a directory then every new object created in
this directory will have storage class set to "important" and "noowner" flag set. A newly created
object inherits always the current set of its parent's attributes. Changing a
directory attribute does not affect its already created children. To change
an attribute for a directory and all of its children use
-r option.
"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"
mfsmount (8), mfstools (1), mfssclass (1)