[[man_de_lvreduce]]

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man_de_lvreduce [2016/03/30 15:33] (Version actuelle)
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 +==== Manuel de la commande "​lvreduce"​ ====
  
 +<​code>​LVREDUCE(8) ​                                             System Manager'​s Manual ​                                            ​LVREDUCE(8)
 +
 +
 +
 +NAME
 +       ​lvreduce — reduce the size of a logical volume
 +
 +SYNOPSIS
 +       ​lvreduce ​ [-A|--autobackup ​ {y|n}] [--commandprofile ProfileName] [-d|--debug] [-h|--help] [-t|--test] [-v|--verbose] [--version]
 +       ​[-f|--force] ​ [--noudevsync] ​  ​{-l|--extents ​  ​[-]LogicalExtentsNumber[%{VG|LV|FREE|ORIGIN}] ​  ​| ​  ​[-L|--size ​  ​[-]LogicalVolume‐
 +       ​Size[bBsSkKmMgGtTpPeE]} [-n|--nofsck] [-r|--resizefs] LogicalVolume{Name|Path}
 +
 +DESCRIPTION
 +       ​lvreduce ​ allows ​ you  to reduce the size of a logical volume. ​ Be careful when reducing a logical volume'​s size, because data in
 +       the reduced part is lost!!!
 +       You should therefore ensure that any filesystem on the volume is resized before running lvreduce so that the extents that are  to
 +       be removed are not in use.
 +       ​Shrinking snapshot logical volumes (see lvcreate(8) for information to create snapshots) is supported as well.  But to change the
 +       ​number of copies in a mirrored logical volume use lvconvert(8).
 +       Sizes will be rounded if necessary - for example, the volume size must be an exact number of extents and the size  of  a  striped
 +       ​segment must be a multiple of the number of stripes.
 +
 +OPTIONS
 +       See lvm(8) for common options.
 +
 +       -f, --force
 +              Force size reduction without prompting even when it may cause data loss.
 +
 +       -l, --extents [-]LogicalExtentsNumber[%{VG|LV|FREE|ORIGIN}]
 +              Reduce ​ or set the logical volume size in units of logical extents. ​ With the - sign the value will be subtracted from the
 +              logical volume'​s actual size and without it the value will be taken as an absolute size.  The  total  number ​ of  physical
 +              extents ​ freed  will  be  greater than this logical value if, for example, the volume is mirrored. ​ The number can also be
 +              expressed as a percentage of the total space in the Volume Group with the suffix %VG, relative to the existing size of the
 +              Logical Volume with the suffix %LV, as a percentage of the remaining free space in the Volume Group with the suffix %FREE,
 +              or (for a snapshot) as a percentage of the total space in the Origin Logical Volume with the suffix %ORIGIN. ​ The  result‐
 +              ing  value for the subtraction is rounded downward, for the absolute size it is rounded upward. ​ N.B. In a future release,
 +              when expressed as a percentage with VG or FREE, the number will be treated as an  approximate ​ total  number ​ of  physical
 +              extents ​ to be freed (including extents used by any mirrors, for example). ​ The code may currently release more space than
 +              you might otherwise expect.
 +
 +       -L, --size [-]LogicalVolumeSize[bBsSkKmMgGtTpPeE]
 +              Reduce or set the logical volume size in units of megabytes. ​ A size suffix of k for kilobyte, m for megabyte, g for giga‐
 +              bytes, ​ t for terabytes, p for petabytes or e for exabytes is optional. ​ With the - sign the value will be subtracted from
 +              the logical volume'​s actual size and without it it will be taken as an absolute size.
 +
 +       -n, --nofsck
 +              Do not perform fsck before resizing filesystem when filesystem requires it. You may need to use --force ​ to  proceed ​ with
 +              this option.
 +
 +       ​--noudevsync
 +              Disable ​ udev synchronisation. The process will not wait for notification from udev.  It will continue irrespective of any
 +              possible udev processing in the background. ​ You should only use this if udev is not running or has rules that ignore ​ the
 +              devices LVM2 creates.
 +
 +       -r, --resizefs
 +              Resize underlying filesystem together with the logical volume using fsadm(8).
 +
 +Examples
 +       ​Reduce the size of logical volume lvol1 in volume group vg00 by 3 logical extents:
 +
 +       ​lvreduce -l -3 vg00/lvol1
 +
 +SEE ALSO
 +       ​fsadm(8),​ lvchange(8),​ lvconvert(8),​ lvcreate(8),​ lvextend(8),​ lvm(8), lvresize(8),​ vgreduce(8)
 +
 +
 +
 +Sistina Software UK                                LVM TOOLS 2.02.111(2) (2014-09-01) ​                                       LVREDUCE(8)
 +</​code>​
  • man_de_lvreduce.txt
  • Dernière modification: 2016/03/30 15:33
  • (modification externe)