PG-DBA培训12:PostgreSQL物理备份与恢复实战
-- 创建表空间
CREATE TABLESPACE tbs_physical_backup LOCATION '/path/to/tbs_physical_backup';
-- 创建用于物理备份的角色和权限
CREATE ROLE physical_backup_user LOGIN PASSWORD 'strong-password';
GRANT tbs_physical_backup TO physical_backup_user;
-- 授予物理备份用户对特定数据库的备份权限
GRANT BACKUP TABLESPACE tbs_physical_backup TO physical_backup_user;
-- 授予恢复权限
GRANT RESTORE TABLESPACE tbs_physical_backup TO physical_backup_user;
-- 切换到物理备份用户
SET ROLE physical_backup_user;
-- 执行物理备份
BACKUP TABLESPACE tbs_physical_backup TO '/path/to/backup/directory';
-- 恢复之前备份的表空间
RESTORE TABLESPACE tbs_physical_backup FROM '/path/to/backup/directory';
-- 重置权限和角色
REVOKE BACKUP TABLESPACE tbs_physical_backup FROM physical_backup_user;
REVOKE RESTORE TABLESPACE tbs_physical_backup FROM physical_backup_user;
DROP ROLE physical_backup_user;
DROP TABLESPACE tbs_physical_backup;
以上代码展示了如何在PostgreSQL中创建一个用于物理备份的角色,授予该角色备份和恢复特定表空间的权限,执行备份和恢复操作,然后清理权限和角色。这是一个简化的例子,实际使用时需要根据具体的数据库环境和安全策略进行调整。
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