Increase or Decrease the Size of Static Partition in LVM and providing Elasticity to DataNodeStorage.

ARTH - Task 7 : Task 7.1

Note: This task some content is remaining because of some technical gliches so I will be adding it soon.

Task Description :

?? 7.1: Elasticity Task

• Integrating LVM with Hadoop and providing Elasticity to DataNodeStorage
• Increase or Decrease the Size of Static Partition in Linux.
• Automating LVM Partition using Python-Script.

> First of all, we attach two new hard disks of any size to the VM.

> Then start VM. and run fdisk -l.

> Here we can see that two new hard disks of 10Gib and 20Gib have been attached.

> Now we have to create a physical volume of the hard disk which we have attached.

> Now, we have to create a volume group (vg) of both attached hard disks, so that we can make use of it, with a combined capacity of storage.

> This type of volume is called the Logical Volume Group(LVM).

> Creation of Partition in Volume Group.

> Format - #mkfs.ext4 /dev/vg_name/lvm_name

> Mount - #mount /dev/vg_name/lvm_name /folder_name

> Now, if we run “df -h”, we can see that /dev/myvg/mylv drive is attached to /l1 folder and storage of 25Gib.

> We can also extend our drive storage by adding some storage in LVM from remaining space of vg(volume group) or by adding more hard disk into the VM.

> command to extend the storage of LVM from vg - “ #lvextend --size +xG /dev/vgname/lvmname “

> Now, if we run “fdisk-l”, we can see that /dev/myvg-mylv drive is attached to storage of 29Gib.

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