gpinitsystem_config初始化文件
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#### OPTIONAL MIRROR PARAMETERS
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#### Base number by which mirror segment port numbers
#### are calculated.
MIRROR_PORT_BASE=53000
#### Base number by which primary file replication port
#### numbers are calculated.
REPLICATION_PORT_BASE=43000
#### Base number by which mirror file replication port
#### numbers are calculated.
MIRROR_REPLICATION_PORT_BASE=54000
#### File system location(s) where mirror segment data directories
#### will be created. The number of mirror locations must equal the
#### number of primary locations as specified in the
#### DATA_DIRECTORY parameter.
#declare -a MIRROR_DATA_DIRECTORY=(/data1/mirror /data1/mirror /data1/mirror /data2/mirror /data2/mirror /data2/mirror)
declare -a MIRROR_DATA_DIRECTORY=(/home/gpadmin/gpdata/gpdatam1 /home/gpadmin/gpdata/gpdatam2)