FAULT_GROUPS
查看容错组和它们在群集中的层次结构。
示例
显示群集中的容错组的当前层次结构：
vmartdb=> SELECT member_type, member_name, parent_type, CASE
WHEN parent_type = 'DATABASE' THEN ''
ELSE parent_name END FROM fault_groups
ORDER BY member_name;
member_type | member_name | parent_type | parent_name
-------------+-----------------------+-------------+-------------
NODE | v_vmart_node0001 | FAULT GROUP | two
NODE | v_vmart_node0002 | FAULT GROUP | two
NODE | v_vmart_node0003 | FAULT GROUP | three
FAULT GROUP | one | DATABASE |
FAULT GROUP | three | DATABASE |
FAULT GROUP | two | FAULT GROUP | one
查看区段布局的分布：
vmartdb=> SELECT segment_layout from elastic_cluster;
segment_layout
-------------------------------------------------------------------------
v_vmart_node0001[33.3%] v_vmart_node0003[33.3%] v_vmart_node0004[33.3%]
(1 row)