lvm clone lv As a result, using pvmove with pvmove -n lv.root /dev/md01 /dev/md10 /dev/md20 would allow any parts of the LV that won't fit into md10 to overflow into md20 in a controlled manner. After lv.root is done, you could then use pvmove -n lv.cache /dev/md01 /dev/md20 to explicitly move lv.cache to md20 only. –
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0 · lvm
1 · linux
2 · Move a logical volume from one volume group to another
3 · LVM commands
4 · LVM
5 · How to move / copy logical volume (lv) to another volume group
6 · How to migrate (move) logical volumes and volume groups
7 · Cloning Logical Volume using LVM
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As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move.As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move.Sometime it is necessary to clone full LV (Logical Volume). Here we will try to do this using LVM2 commands. First let's create a test LV: # lvcreate -n test -L1g /dev/rootvg. .. # mkfs.ext3 -j -m0 /dev/rootvg/test. .. # mount /dev/rootvg/test /mnt/s. Copy some files on it to verify the integrity of the content later. Now let's make it a mirror.As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move.
In this article I will show you two methods to migrate a logical volume /dev/rhel/lv1 from one disk to another without reboot assuming you have the extra disk already available on your system. Below steps are validated on Red Hat Enterprise Linux 7.
As a result, using pvmove with pvmove -n lv.root /dev/md01 /dev/md10 /dev/md20 would allow any parts of the LV that won't fit into md10 to overflow into md20 in a controlled manner. After lv.root is done, you could then use pvmove -n lv.cache /dev/md01 /dev/md20 to explicitly move lv.cache to md20 only. –
Under any other circumstances we would clone the drive using dd, but in this instance we would like to migrate just the LVM configuration from the old system disk to a new Ubuntu installation on a fresh disk. How can we migrate an existing LVM configuration into a new system installation on a new drive?
Desactivate the LVM management of the second HD: "vgchange -a n /dev/LVM2". Clone the harddisk, with "dd". For every physical volume, generate new UUIDs for the clone disk, with "pvchange -u /dev/hdb*". Change the VG UUID with "vgchange -u LVM". This will change the UUID of one of the VG, could be the original or the clone. It doesn't matter.To turn the LV into an image file and use SCP to move it. Then use DD to copy the file back to a new LV on the new host. The problem with this method is you need twice as much disk space as the VM takes on both machines. ie. a 5GB LV uses 5GB of space for the LV and the dd copy also uses an additional 5GB of space for the image.
Logical Volume Manager (LVM) is a device mapper framework that provides logical volume management for the Linux kernel. Background. LVM building blocks. Logical Volume Management utilizes the kernel's device-mapper feature to provide a system of partitions independent of underlying disk layout.As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move.
As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move.
Sometime it is necessary to clone full LV (Logical Volume). Here we will try to do this using LVM2 commands. First let's create a test LV: # lvcreate -n test -L1g /dev/rootvg. .. # mkfs.ext3 -j -m0 /dev/rootvg/test. .. # mount /dev/rootvg/test /mnt/s. Copy some files on it to verify the integrity of the content later. Now let's make it a mirror.As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move. In this article I will show you two methods to migrate a logical volume /dev/rhel/lv1 from one disk to another without reboot assuming you have the extra disk already available on your system. Below steps are validated on Red Hat Enterprise Linux 7.
As a result, using pvmove with pvmove -n lv.root /dev/md01 /dev/md10 /dev/md20 would allow any parts of the LV that won't fit into md10 to overflow into md20 in a controlled manner. After lv.root is done, you could then use pvmove -n lv.cache /dev/md01 /dev/md20 to explicitly move lv.cache to md20 only. – Under any other circumstances we would clone the drive using dd, but in this instance we would like to migrate just the LVM configuration from the old system disk to a new Ubuntu installation on a fresh disk. How can we migrate an existing LVM configuration into a new system installation on a new drive?Desactivate the LVM management of the second HD: "vgchange -a n /dev/LVM2". Clone the harddisk, with "dd". For every physical volume, generate new UUIDs for the clone disk, with "pvchange -u /dev/hdb*". Change the VG UUID with "vgchange -u LVM". This will change the UUID of one of the VG, could be the original or the clone. It doesn't matter.
To turn the LV into an image file and use SCP to move it. Then use DD to copy the file back to a new LV on the new host. The problem with this method is you need twice as much disk space as the VM takes on both machines. ie. a 5GB LV uses 5GB of space for the LV and the dd copy also uses an additional 5GB of space for the image.Logical Volume Manager (LVM) is a device mapper framework that provides logical volume management for the Linux kernel. Background. LVM building blocks. Logical Volume Management utilizes the kernel's device-mapper feature to provide a system of partitions independent of underlying disk layout.As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move.As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move.
Sometime it is necessary to clone full LV (Logical Volume). Here we will try to do this using LVM2 commands. First let's create a test LV: # lvcreate -n test -L1g /dev/rootvg. .. # mkfs.ext3 -j -m0 /dev/rootvg/test. .. # mount /dev/rootvg/test /mnt/s. Copy some files on it to verify the integrity of the content later. Now let's make it a mirror.As of the LVM in Debian stretch (9.0), namely 2.02.168-2, it's possible to do a copy of a logical volume across volume groups using a combination of vgmerge, lvconvert, and vgsplit. Since a move is a combination of a copy and a delete, this will also work for a move. In this article I will show you two methods to migrate a logical volume /dev/rhel/lv1 from one disk to another without reboot assuming you have the extra disk already available on your system. Below steps are validated on Red Hat Enterprise Linux 7.As a result, using pvmove with pvmove -n lv.root /dev/md01 /dev/md10 /dev/md20 would allow any parts of the LV that won't fit into md10 to overflow into md20 in a controlled manner. After lv.root is done, you could then use pvmove -n lv.cache /dev/md01 /dev/md20 to explicitly move lv.cache to md20 only. –
Under any other circumstances we would clone the drive using dd, but in this instance we would like to migrate just the LVM configuration from the old system disk to a new Ubuntu installation on a fresh disk. How can we migrate an existing LVM configuration into a new system installation on a new drive?Desactivate the LVM management of the second HD: "vgchange -a n /dev/LVM2". Clone the harddisk, with "dd". For every physical volume, generate new UUIDs for the clone disk, with "pvchange -u /dev/hdb*". Change the VG UUID with "vgchange -u LVM". This will change the UUID of one of the VG, could be the original or the clone. It doesn't matter.
To turn the LV into an image file and use SCP to move it. Then use DD to copy the file back to a new LV on the new host. The problem with this method is you need twice as much disk space as the VM takes on both machines. ie. a 5GB LV uses 5GB of space for the LV and the dd copy also uses an additional 5GB of space for the image.
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lvm clone lv|Move a logical volume from one volume group to another
