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lvconvert
Langue: en
Version: 184168 (CentOS - 06/07/09)
Section: 8 (Commandes administrateur)
NAME
lvconvert - convert a logical volume from linear to mirror or snapshotSYNOPSIS
lvconvert -m/--mirrors Mirrors [--mirrorlog {disk|core}] [--corelog] [-R/--regionsize MirrorLogRegionSize] [-A/--alloc AllocationPolicy] [-b/--background] [-i/--interval Seconds] [-h/-?/--help] [-v/--verbose] [--version]LogicalVolume[Path] [PhysicalVolume[Path]...]
lvconvert -s/--snapshot [-c/--chunksize ChunkSize] [-h/-?/--help] [-v/--verbose] [-Z/--zero y/n] [--version]
OriginalLogicalVolume[Path] SnapshotLogicalVolume[Path]
DESCRIPTION
lvconvert will change a linear logical volume to a mirror logical volume or to a snapshot of linear volume and vice versa. It is also used to add and remove disk logs from mirror devices.OPTIONS
See lvm for common options.Exactly one of --mirrors or --snapshot arguments required.
- -m, --mirrors Mirrors
- Specifies the degree of the mirror you wish to create. For example, "-m 1" would convert the original logical volume to a mirror volume with 2-sides; that is, a linear volume plus one copy.
- --mirrorlog {disk|core}
- Specifies the type of log to use. The default is disk, which is persistent and requires a small amount of storage space, usually on a separate device from the data being mirrored. Core may be useful for short-lived mirrors: It means the mirror is regenerated by copying the data from the first device again every time the device is activated - perhaps, for example, after every reboot.
- --corelog
- The optional argument "--corelog" is the same as specifying "--mirrorlog core".
- -R, --regionsize MirrorLogRegionSize
- A mirror is divided into regions of this size (in MB), and the mirror log uses this granularity to track which regions are in sync.
- -b, --background
- Run the daemon in the background.
- -i, --interval Seconds
- Report progress as a percentage at regular intervals.
- -s, --snapshot
- Create a snapshot from existing logical volume using another existing logical volume as its origin.
- -c, --chunksize ChunkSize
- Power of 2 chunk size for the snapshot logical volume between 4k and 512k.
- -Z, --zero y/n
- Controls zeroing of the first KB of data in the snapshot. If the volume is read-only the snapshot will not be zeroed.
Examples
"lvconvert -m1 vg00/lvol1"converts the linear logical volume "vg00/lvol1" to a two-way mirror logical volume.
"lvconvert --mirrorlog core vg00/lvol1"
converts a mirror with a disk log to a mirror with an in-memory log.
"lvconvert --mirrorlog disk vg00/lvol1"
converts a mirror with an in-memory log to a mirror with a disk log.
"lvconvert -m0 vg00/lvol1"
converts a mirror logical volume to a linear logical volume.
"lvconvert -s vg00/lvol1 vg00/lvol2"
converts logical volume "vg00/lvol2" to snapshot of original volume "vg00/lvol1"
SEE ALSO
lvm(8), vgcreate(8), lvremove(8), lvrename(8), lvextend(8), lvreduce(8), lvdisplay(8), lvscan(8)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre