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A Brief Look By: Aaron J Hudson

A Brief Look By: Aaron J Hudson. What is Logical Volume Management?. Software that allows the user to edit the storage configuration without manipulating the actual hardware and vice versa. How Does LVM Work?. The LVM hides information about where information is stored, on which hardware,

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A Brief Look By: Aaron J Hudson

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  1. A Brief Look By: Aaron J Hudson

  2. What is Logical Volume Management? Software that allows the user to edit the storage configuration without manipulating the actual hardware and vice versa.

  3. How Does LVM Work? The LVM hides information about where information is stored, on which hardware, and where exactly on that hardware from the entire Operating System allowing it to manipulate the configuration of the storage capacities.

  4. Configuring LVM using SuSe Linux as the OS of choice (command line) • 3 set-up steps for LVM • Define & Initialize Physical Volumes planning to use • Define Volume Groups planning to group PVs together • Set up Logical Volumes on each VG

  5. Command line tools for configuration • pvcreate /dev/device [/dev/device] • pvcreate command initializes a physical device as a physical volume. • vgcreate vg-name /dev/device [dev/device] • vgcreate command creates a volume group with all the physical volumes specified. • lvcreate –L size –n lv-name vg-name • lvcreate command creates a logical volume on the volume group vg-name.

  6. Extending Volume without losing data • First you create your physical volumes by the following command: • pvcreate /dev/device1 • Then you extend your volume groups using this command: • vgextend vg-name /dev/device1

  7. Shrinking Volume without losing data • Removing a physical volume is just as simple by using the following command: • vgreduce vg-name /dev/device

  8. Advantages • LVM has the capacity to manage extremely large data sets • PVs can be added, VG’s and VL’s can be extended while file systems are still mounted and in use

  9. Source Page • SuSe Linux (LVM) • Google (images) • Cool Text (fonts)

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