On RedHat\/Centos Linux – LVM experiments<\/p>\n
Concepts to understand:<\/strong><\/p>\n Physical Volume:<\/strong> Physical Hard Drive or\u00a0 Partitions in Physical Hard Drive<\/p>\n Physical Extent:<\/strong>\u00a0 One unit of space usually 4 MB.<\/p>\n Volume Group:<\/strong> One or multiple Physical Volumes can be assigned to a Volume Group<\/p>\n Logical Volume:<\/strong> Logical volumes are created from the volume groups. This is the volume that users interact with. You mount Logical Volume to work with a logical hard drive space (not partition though similar)<\/p>\n Linux Commands to Know:<\/strong><\/p>\n pvcreate : create\u00a0 a physical volume. Initialize a physical drive or partition for LVM<\/p>\n vgcreate: create volume group. Parameters: hard drive or partitions<\/p>\n lvcreate: create logical volume from volume group<\/p>\n lvextend: extend a logical volume<\/p>\n lvresize, lvreduce: to resize or to reduce logical volume<\/p>\n lvremove: to remove a logical volume<\/p>\n <\/p>\n Some experiment:<\/p>\n I added some hard drives using VMWARE.<\/p>\n lsblk On RedHat\/Centos Linux – LVM experiments Concepts to understand: Physical Volume: Physical Hard Drive or\u00a0 Partitions in Physical Hard Drive Physical Extent:\u00a0 One unit of space usually 4 MB. Volume Group: One or multiple Physical Volumes can be assigned to a Volume Group Logical Volume: Logical volumes are created from the volume groups. This is … <\/p>\n
\npvcreate \/dev\/sdb \/dev\/sdc
\nvgcreate vg001 \/dev\/sdb \/dev\/sdc
\nlvcreate -L 500M vg001
\nlsblk
\nlvcreate -l 100 vg001
\nlsblk
\npvs
\npvdisplay
\npvdisplay -v
\nvgcreate -s 8m \/dev\/sde
\nlsblk
\nvgcreate vg002 -s 8m \/dev\/sdd
\npv
\npvs
\npvdisplay
\nlvcreate -L 1G vg002
\nlsblk
\nlvextend lv001 +100M
\nlvextend vg001-lvol0 +100M
\nlvextend \/dev\/sdb\/vg001-lvol0 +100M
\nlsblk
\nlvrename vg01 lvol0 lvolnew
\nlvrename vg001 lvol0 lvolnew
\nlsblk
\nlvextend vg001 lvolnew +100M
\nlvreduce -L 100m \/dev\/vg001\/lvolnew
\nlsblk
\nlvreduce -L 300m \/dev\/vg001\/lvolnew
\nlvreduce -L 50m \/dev\/vg001\/lvolnew
\nlvresize -L 700m \/dev\/vg001\/lvolnew
\nlsblk
\nlvextend vg001 lvolnew +100M
\nlvextend \/dev\/vg001\/lvolnew +100M
\nlvextend -L 100m \/dev\/vg001\/lvolnew
\nlvextend +100m \/dev\/vg001\/lvolnew
\nlvextend -L 200 \/dev\/vg001\/lvolnew
\nlvextend -L 200m \/dev\/vg001\/lvolnew
\nlvextend -l 200 \/dev\/vg001\/lvolnew
\nlsblk
\nlvextend -l 210 \/dev\/vg001\/lvolnew
\nlsblk
\nlvextend vg001 lvolnew +100M
\nhistory
\nhistory > history.txt<\/p>\n","protected":false},"excerpt":{"rendered":"