Describes how to create the directory locations where Greenplum Database data is stored for each coordinator, standby, and segment instance.
Parent topic: Installing and Upgrading Greenplum
A data storage area is required on the Greenplum Database coordinator and standby coordinator hosts to store Greenplum Database system data such as catalog data and other system metadata.
The data directory location on the coordinator is different than those on the segments. The coordinator does not store any user data, only the system catalog tables and system metadata are stored on the coordinator 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 coordinator data storage area. This directory should have sufficient disk space for your data and be owned by the
gpadmin user and group. For example, run the following commands as
# mkdir -p /data/coordinator
Change ownership of this directory to the
gpadmin user. For example:
# chown gpadmin:gpadmin /data/coordinator
Using gpssh, create the coordinator data directory location on your standby coordinator as well. For example:
# source /usr/local/greenplum-db/greenplum_path.sh # gpssh -h scdw -e 'mkdir -p /data/coordinator' # gpssh -h scdw -e 'chown gpadmin:gpadmin /data/coordinator'
Data storage areas are required on the Greenplum Database segment hosts for primary segments. Separate storage areas are required for mirror segments.
On the coordinator 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_segonly file 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/*'