Preinstallation Lab

[marianomier]

Preinstallation Labs

Checking vm.swappiness

echo "vm.swappiness = 1" >> /etc/sysctl.conf

echo 1 > /proc/sys/vm/swappiness

Mounting disks

sudo lsblk -fs

sudo parted /dev/xvdb mklabel gpt

sudo parted -a opt /dev/xvdb mkpart primary ext4 0% 100

sudo mkfs.ext4 -L datapartition /dev/xvdb

vi /etc/fstab

/dev/xvdb /data00 ext4 defaults,noatime 1 2

/dev/xvdc /data01 ext4 defaults,noatime 1 2

sudo mount -o defaults /dev/xvdb /data00

sudo mount -o defaults /dev/xvdc /data01

Disabling Transparent Huge Pages

echo never > /sys/kernel/mm/transparent_hugepage/defrag

echo never > /sys/kernel/mm/transparent_hugepage/enabled</code

vi /etc/rc.local

Adding to rc.local

/sys/kernel/mm/transparent_hugepage/defrag

/sys/kernel/mm/transparent_hugepage/enabled

Network Configuration

nslookup ip-172-31-63-6

dig -x 172.31.63.6

Showing ntpd service

Installing MariaDB Database

yum install mariadb-server

vi /etc/my.cnf

Replacing with code /my.cnf

systemctl start mariadb

sudo /usr/bin/mysql_secure_installation

Creating Databases for Hadoop services