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Logical Volume Manager. An Introduction

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J
Juan A. Suárez Romero

Introduction to LVM and how it is related with other modules like LUKS.

Technology
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Logical Volume Manager ,[object Object]
Logical Volume Manager What is? ,[object Object],[object Object]
Logical Volume Manager What is? ,[object Object],[object Object]
Logical Volume Manager Concepts ,[object Object],[object Object],[object Object],[object Object],[object Object]
Logical Volume Manager Concepts ,[object Object],VG /dev/sda1 /dev/vg/lv1 /dev/sda2 /dev/vg/lv2 /dev/vg/lv3
Logical Volume Manager PVs ,[object Object],[object Object],[object Object],[object Object],[object Object],(1) Create one or more partitions with fdisk, with type LVM (2) pvcreate /dev/<partition>
Logical Volume Manager VGs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Logical Volume Manager VGs (1) Create one or more partitions with fdisk, with type LVM (2) pvcreate /dev/sda1 (3) pvcreate /dev/hdb2 (4) pvcreate /dev/hdc3 (5) vgcreate myvg /dev/sda1 /dev/hdb2 /dev/hdc3
Logical Volume Manager LVs ,[object Object],[object Object],[object Object],[object Object],[object Object]
Logical Volume Manager LVs (1) Create a VG (2) lvcreate -L<size> -n <name> <vg> lvcreate -L10G -n mylv myvg It creates /dev/myvg/mylv (a link to /dev/mapper/myvg-mylv ) mkfs.ext3 /dev/myvg/mylv
Logical Volume Manager Snapshots ,[object Object],[object Object],[object Object],lvcreate -s -L<size> -n <name> <lv> RW: lvcreate -s -L1G -n mylv-snapshot /dev/myvg/mylv RO: lvcreate -s -L1G -n mylv-snapshot -p r /dev/myvg/mylv
Logical Volume Manager Snapshots ,[object Object],[object Object],[object Object]
Logical Volume Manager Uses of Snapshots ,[object Object],[object Object],[object Object],[object Object],lvcreate -s -L1G -n snaproot /dev/vg/lvroot run-backup.sh /dev/vg/snaproot lvremove -f /dev/vg/snaproot
Logical Volume Manager LVM and other technologies /dev/* /dev/mapper/* /dev/* /dev/* /dev/md0 LUKS RAID
Logical Volume Manager LVM and other technologies /dev/* /dev/mapper/* /dev/* /dev/vg/* /dev/* /dev/* /dev/vg/* LUKS LVM
Logical Volume Manager LVM and other technologies /dev/* /dev/vg/* /dev/vg/* LUKS LVM
Logical Volume Manager LVM and other technologies /dev/vg/* /dev/* /dev/mapper/* LUKS LVM
Logical Volume Manager LVM and other technologies /dev/vg/* /dev/vg/* /dev/* /dev/* LUKS LVM RAID
Logical Volume Manager LVM and other technologies /dev/* /dev/* /dev/* /dev/vg1/* /dev/* /dev/* /dev/* /dev/vg2/* /dev/vg3/* /dev/vg3/* LUKS LUKS LVM LVM LVM
Logical Volume Manager My Laptop /dev/sdaA tmp home swap sbox root var music /dev/sdaB /dev/sdaC LUKS VG-CRYPT VG-UNCRYPT
Logical Volume Manager The End That's all, folks!

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Logical Volume Manager. An Introduction

  • 1.
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8. Logical Volume Manager VGs (1) Create one or more partitions with fdisk, with type LVM (2) pvcreate /dev/sda1 (3) pvcreate /dev/hdb2 (4) pvcreate /dev/hdc3 (5) vgcreate myvg /dev/sda1 /dev/hdb2 /dev/hdc3
  • 9.
  • 10. Logical Volume Manager LVs (1) Create a VG (2) lvcreate -L<size> -n <name> <vg> lvcreate -L10G -n mylv myvg It creates /dev/myvg/mylv (a link to /dev/mapper/myvg-mylv ) mkfs.ext3 /dev/myvg/mylv
  • 11.
  • 12.
  • 13.
  • 14. Logical Volume Manager LVM and other technologies /dev/* /dev/mapper/* /dev/* /dev/* /dev/md0 LUKS RAID
  • 15. Logical Volume Manager LVM and other technologies /dev/* /dev/mapper/* /dev/* /dev/vg/* /dev/* /dev/* /dev/vg/* LUKS LVM
  • 16. Logical Volume Manager LVM and other technologies /dev/* /dev/vg/* /dev/vg/* LUKS LVM
  • 17. Logical Volume Manager LVM and other technologies /dev/vg/* /dev/* /dev/mapper/* LUKS LVM
  • 18. Logical Volume Manager LVM and other technologies /dev/vg/* /dev/vg/* /dev/* /dev/* LUKS LVM RAID
  • 19. Logical Volume Manager LVM and other technologies /dev/* /dev/* /dev/* /dev/vg1/* /dev/* /dev/* /dev/* /dev/vg2/* /dev/vg3/* /dev/vg3/* LUKS LUKS LVM LVM LVM
  • 20. Logical Volume Manager My Laptop /dev/sdaA tmp home swap sbox root var music /dev/sdaB /dev/sdaC LUKS VG-CRYPT VG-UNCRYPT
  • 21. Logical Volume Manager The End That's all, folks!