Creating the Data Storage Areas
Describes how to create the directory locations where Greenplum Database data is stored for each master, standby, and segment instance.
Parent topic:Installing and Upgrading Greenplum
A data storage area is required on the Greenplum Database master and standby master hosts to store Greenplum Database system data such as catalog data and other system metadata.
The data directory location on the master is different than those on the segments. The master does not store any user data, only the system catalog tables and system metadata are stored on the master instance, therefore you do not need to designate as much storage space as on the segments.
Create or choose a directory that will serve as your master data storage area. This directory should have sufficient disk space for your data and be owned by the
gpadminuser and group. For example, run the following commands as
# mkdir -p /data/master
Change ownership of this directory to the
gpadminuser. For example:
# chown gpadmin:gpadmin /data/master
Using gpssh, create the master data directory location on your standby master as well. For example:
# source /usr/local/greenplum-db/greenplum_path.sh # gpssh -h smdw -e 'mkdir -p /data/master' # gpssh -h smdw -e 'chown gpadmin:gpadmin /data/master'
Data storage areas are required on the Greenplum Database segment hosts for primary segments. Separate storage areas are required for mirror segments.
On the master host, log in as
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
Using gpssh, create the primary and mirror data directory locations on all segment hosts at once using the
hostfile_gpssh_segonlyfile you just created. For example:
# source /usr/local/greenplum-db/greenplum_path.sh # gpssh -f hostfile_gpssh_segonly -e 'mkdir -p /data/primary' # gpssh -f hostfile_gpssh_segonly -e 'mkdir -p /data/mirror' # gpssh -f hostfile_gpssh_segonly -e 'chown -R gpadmin /data/*'