Volume manager server full#
Volume manager server series#
Volume manager server free#

Volume manager server free#

# df -TH Check the Disk SpaceĪbove image shows the mount Point we are using 18GB fully used for root, so there is no free space available.Ĥ. Only vda used, Currently Centos Installed /boot, /, swap, in vda physical disk using lvm there were no space remaining in this disk. Free PE – Here it’s already used so there was no free PE.ģ.

Volume manager server full#

Alloc PE – Total PE Used, full PE already Used, 4482 x 4PE = 17928.

Here the Explanation –> 1024MB = 1GB, if so 1024MB x 5 = 5120PE = 5GB, Now Divide the 5120/4 = 1280, 4 is the Default PE Size. For example, if we need to create 5 GB size of logical volume we can use sum of 1280 PE, Don’t you understand what I’m saying ?.

PE Size – Physical Extends, Size for a disk can be defined using PE or GB size, 4MB is the Default PE size of LVM.

CurPV and Act PV – Currently Using Physical Disk was 1 (vda), And its active, so what we can use this volume group.

Cur LV – Currently there was 2 Logical volumes in this Volume Group.

VG Status – Volume Group can be re-sized, We can Expand more if we need to add more space.

VG Access – Volume Group is in Read and Write and ready to use.

Default PE Size of a Volume Group is 4 MB, Volume group what we are using in this server is configured using default PE. Additionally added Disks are mentioned as Disk1, Disk2, Disk3.Įach and every Disks are 20 GB in Size.Partitions defined in default Disk (vda1 = swap), (vda2 = /).Default Disk using for Operating system (Centos6.5).sda, sdb, sdc # fdisk -l Verify Added Disks It is not Compulsory to use 3 Drives just 1 is Enough to create a new VG and LV inside that vg, I am adding more here for demonstration purpose and for more feature command explanations.įollowing are the disks I have added additionally. For Creating a New Volume Group, we need to add Additional 3 hard disks in this server. So, from here we come to know that there is not enough free space in VDA disk.Ģ.

Volume manager server series#

This series will be titled Preparation for the setting up LVM (Logical Volume Management) through Parts 1-6 and covers the following topics.

Operating System – CentOS 6.5 with LVM Installation.

Restore the file system using Snapshot features to earlier stage.

Migration can be used to recover faulty disk.

Any file systems can be installed and handle.

It is flexible to expand the space at any time.

Volumes can stripes data across multiple disks this can increase the I/O stats. While using logical volumes we can extend across multiple disks, logical volumes or reduce logical volumes in size with some commands without reformatting and re-partitioning the current disk. Inside volume group we need to slice the space to create Logical volumes. A Physical Disk will be grouped to create a volume Group. In a modern world every Server needs more space day by day for that we need to expand depending on our needs. If a disk starts to fail, replacement disk can be registered as a physical volume with the volume group and the logical volumes extents can be migrated to the new disk without data loss. 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 re-sized as we wish. Logical Volume Management ( LVM) makes it easier to manage disk space.