To create the data directory locations on all segment hosts

1. On the master host, log in as root:

   # su

2. Create a file called hostfile_gpssh_segonly. This file should have only one machine configured host name for each segment host. For example, if you have three segment hosts:

   sdw1
   sdw2
   sdw3

3. Using gpssh, create the primary and mirror data directory locations on all segment hosts at once using the hostfile_gpssh_segonly file you just created. For example:

   # source /usr/local/greenplum-db-4.3.x.x/greenplum_path.sh 
   # gpssh -f hostfile_gpssh_segonly -e 'mkdir /data/primary'
   # gpssh -f hostfile_gpssh_segonly -e 'mkdir /data/mirror'
   # gpssh -f hostfile_gpssh_segonly -e 'chown gpadmin /data/primary'
   # gpssh -f hostfile_gpssh_segonly -e 'chown gpadmin /data/mirror'