Integrating LVM with Hadoop and providing Elasticity to DataNode Storage.

LVM From PV

First, we have to create a LVM then mount it to the folder in the “hdfs-site.xml” file of Hadoop.

Step -1

Cmd:-

~ pvcreate /dev/(disk1 name)

~ pvcreate /dev/(disk2 name)

Step -2

Cmd:- vgcreate (name of vg) /dev/(disk2 name) /dev/(disk2 name)

Step -3

Cmd:- lvcreate --size (size in GB) --name (name of lv) (name of vg)

Step -4

Cmd:- mkfs.ext4 /dev/(vg name)/(lv name)

Step -5

Cmd:- mount /dev/(vg name)/(lv name) /(hdfs file folder name)

Step -6

Cmd:- lvextend --size (size you want to extend) /dev/(vg name) /(lv name)

Finally after following this few simple steps we can achieve elasticity in our Hadoop Cluster.

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