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# Before initializing HAWQ, you need to install HDFS and make sure it works.

source /hawq/install/path/greenplum_path.sh

# Besides you need to set password-less ssh on the systems.
source /hawq/install/path/greenplum_path.sh# Exchange SSH keys between the hosts host1, host2, and host3:
hawq ssh-exkeys -h host1 -h host2 -h host3
hawq init cluster # after initialization, HAWQ is started by default

# Now you can stop/restart/start the cluster by using:  
hawq stop/restart/start cluster
 
# HAWQ master and segments are completely decoupled. So you can also init, start or stop the master and segments separately.
# For example, to init: hawq init master, then hawq init segment
# to stop: hawq stop master, then hawq stop segment
# to start: hawq start master, then hawq start segment