文档介绍：一、备份方案:采用多级备份是为了减少了恢复所需要的时间和减少每天备份所需要的时间,而又保证系统有很好的恢复性。以下是一种建议的方案:    每半年做一个数据库的全备份(包含只读表空间) 每个月做一次零级备份(不包含只读表空间) 每个星期做一次一级备份 每天做一个二级备份 任何表空间改成只读状态后做一个该表空间的备份。 当需要时(如四个小时归档文件系统就要接近满了)备份归档文件1、数据库全备份脚本:run{allocatechannelc1typedisk;backupfull tag'dbfull'format'/opt/backup/full_%d_%u'(databaseincludecurrentcontrolfile);sql'altersystemarchivelogcurrent';backupformat'/opt/backup/archivelog_%d_%u'(archivelogall);releasechannelc1;}2、零级备份:run{allocatechannelc1typedisk;backupincrementallevel0filesperset5tag'dbL0'format'/opt/backup/ora_0_%d_%u'(databaseincludecurrentcontrolfile);sql'altersystemarchivelogcurrent';backupformat'/opt/backup/archivelog_%d_%u'(archivelogall);releasechannelc1;}3、一级备份:run{allocatechannelc1typedisk;backupincrementallevel1filesperset5tag'dbL1'format'/opt/backup/ora_0_%d_%u'(databaseincludecurrentcontrolfile);sql'altersystemarchivelogcurrent';backupformat'/opt/backup/archivelog_%d_%u'(archivelogall);releasechannelc1;}4、二级备份:run{allocatechannelc1typedisk;backupincrementallevel2filesperset5tag'dbL2'format'/opt/backup/ora_0_%d_%u'(databaseincludecurrentcontrolfile);sql'altersystemarchivelogcurrent';backupformat'/opt/backup/archivelog_%d_%u'(archivelogall);releasechannelc1;}5、表空间备份脚本(以users表空间为例): run{allocatechannelc1typedisk;backup tag'tsusers'format'/opt/backup/ora_0_%d_%u'tablespaceusers;sql'altersystemarchivelogcurrent';backupformat'/opt/backup/archivelog_%d_%u'(a