SHOW PARAMETERS LIKE 'datafile_disk_percentage';
"zone"	"svr_type"	"svr_ip"	"svr_port"	"name"	"data_type"	"value"	"info"	"section"	"scope"	"source"	"edit_level"	"default_value"	"isdefault"
"zone3"	"observer"	"192.168.200.232"	"2882"	"datafile_disk_percentage"	"INT"	"0"	"the percentage of disk space used by the data files. Range: [0,99] in integer"	"SSTABLE"	"CLUSTER"	"DEFAULT"	"DYNAMIC_EFFECTIVE"	"0"	"1"
"zone1"	"observer"	"192.168.200.233"	"2882"	"datafile_disk_percentage"	"INT"	"0"	"the percentage of disk space used by the data files. Range: [0,99] in integer"	"SSTABLE"	"CLUSTER"	"DEFAULT"	"DYNAMIC_EFFECTIVE"	"0"	"1"
"zone2"	"observer"	"192.168.200.234"	"2882"	"datafile_disk_percentage"	"INT"	"0"	"the percentage of disk space used by the data files. Range: [0,99] in integer"	"SSTABLE"	"CLUSTER"	"DEFAULT"	"DYNAMIC_EFFECTIVE"	"0"	"1"

SHOW PARAMETERS LIKE 'datafile_size';
"zone"	"svr_type"	"svr_ip"	"svr_port"	"name"	"data_type"	"value"	"info"	"section"	"scope"	"source"	"edit_level"	"default_value"	"isdefault"
"zone3"	"observer"	"192.168.200.232"	"2882"	"datafile_size"	"CAPACITY"	"2048G"	"size of the data file. Range: [0, +∞)"	"SSTABLE"	"CLUSTER"	"DEFAULT"	"DYNAMIC_EFFECTIVE"	"0M"	"0"
"zone2"	"observer"	"192.168.200.234"	"2882"	"datafile_size"	"CAPACITY"	"2048G"	"size of the data file. Range: [0, +∞)"	"SSTABLE"	"CLUSTER"	"DEFAULT"	"DYNAMIC_EFFECTIVE"	"0M"	"0"
"zone1"	"observer"	"192.168.200.233"	"2882"	"datafile_size"	"CAPACITY"	"2048G"	"size of the data file. Range: [0, +∞)"	"SSTABLE"	"CLUSTER"	"DEFAULT"	"DYNAMIC_EFFECTIVE"	"0M"	"0"