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Objectives

• Understand the concept of LVM
• Create a Logical Volumes
• Display Logical Volumes
• Delete a Logical Volumes
• Expand a Logical Volumes
• Shrink a Logical Volumes
• Use Logical Volumes snapshots

LVM

Logical Volume Management is a mechanism whose purpose is to abtract the filesystem from the device, thus allowing a filesystem to span across several devices and partitions.

The most important operations that can be accomplished within a filesystem with LVM are

Objectives

• Describe the XFS filesystem
• Manage a XFS filesystem
• Describe the BTR filesystem

XFS

Its a filesystem with better features compared to the ext4 filesystem, among them 

• Maximum filesystem size 16 EB (Exa Bytes)
• Maximum file size 8 EB (Exa Bytes)
• DMA (Direct Memory Access)
• Journal quota information
• Supor extended attributes

XFS Filesystem Maintenance

The mains maintenance task that can be performed on a XFS filesystem are :