You asked: Why we create LVM in Linux?
Logical Volume Management (LVM) makes it easy to manage disk space. If a file system needs more space, it can be added to its logical volumes from the free spaces in its volume group and the file system can be resized as desired.
What is the purpose of LVM on Linux?
LVM is used for the following purposes: Creating single logical volumes from multiple physical volumes or entire hard drives (somewhat similar to RAID 0, but more similar to JBOD), allowing dynamic resizing of the volume.
Do I need LVM on Linux?
LVM can be extremely useful in dynamic environments, when disks and partitions are often moved or resized. While normal partitions can also be resized, LVM is much more flexible and provides extended functionality. As a mature system, LVM is also very stable and all Linux distributions support it by default.
What is LVM configuration?
LVM means Logical volume management. It is a management system for logical volumes, or file systems, that is much more advanced and flexible than the traditional method of partitioning a disk into one or more slices and formatting that partition with a file system.
Is LVM a RAID?
LVM is like RAID-0, there is no redundancy. With the data split across all four disks, there is a 7.76% chance that one disk will crash and all data will be lost. Conclusion: LVM has no redundancy, no RAID-0, and backups are extremely important. Also, don’t forget to test your recovery process!
How do I know if I have an LVM?
Try running lvdisplay on the command line and it should show any LVM volumes if it exists. Run df in the MySQL data directory; this will return the device where the directory resides. Then run lvs or lvdisplay to check if the device is LVM.
Should I use LVM when installing Ubuntu?
If you are using Ubuntu on a laptop with a single internal hard drive and you don’t need extended features like live snapshots, then could not you need LVM. If you need easy expansion or want to combine multiple hard drives into a single storage pool, LVM may be what you are looking for.
What is the difference between LVM1 and LVM2?
What is the difference between LVM1 and LVM2? LVM2 uses the device mapper driver contained in 2.6 kernel version. LVM1 was included in the 2.4 series kernels. … It comes together to bring together a collection of logical and physical volumes in one administrative unit.
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