rman rman全备份份和零级备份有什么区别

博客访问:
博文数量: 5701
注册时间:
认证徽章:
Oracle , MySQL, SAP IQ 技术讨论,希望在这里一起分享知识,讨论技术,畅谈人生 。
ITPUB论坛APP
ITPUB论坛APP
APP发帖 享双倍积分
IT168企业级官微
微信号:IT168qiye
系统架构师大会
微信号:SACC2013
分类: Linux
官方文档B14194-03 Backup and Recovery Reference描述 FULLCreates a backup of all blocks of datafiles included in the backup. FULL is the opposite of INCREMENTAL.RMAN makes full backups by default if neither FULL nor INCREMENTAL is specified.A full backup has no effect on subsequent incremental backups, and is not considered a part of any incremental backup strategy (though a full image copy backup can be incrementally updated by applying incremental backups with the RECOVER command). &INCREMENTAL LEVEL [=]integerCopies only those data blocks that have changed since the last incremental integer backup, where integer is 0 or 1. An incremental backup at level 0 backs up all data blocks in datafiles being backed up. An incremental backup at level 1 backs up only changed blocks. An incremental backup can be either differential or cumulative.In a cumulative level 1 incremental backup, RMAN backs up all blocks changed since the most recent level 0 backup. In a differential level 1 incremental backup, RMAN backs up blocks updated since the last level 0 or level 1 incremental backup.& Incremental backups at level 0 can be either backup sets or image copies.& Incremental backups at level 1 can only be backup sets.&& A level 0 backup must exist as the base backup for an incremental strategy. An incremental backup at level 0 is identical in content to a full backup, butunlike a full backup the level 0 backup is considered a part of the incrementalstrategy. If no level 0 backup exists when you run a level 1 backup, thenRMAN makes a level 0 backup automatically.
阅读(2042) | 评论(0) | 转发(0) |
相关热门文章
给主人留下些什么吧!~~
请登录后评论。2010年4月 Oracle大版内专家分月排行榜第二
2010年1月 Oracle大版内专家分月排行榜第三
本帖子已过去太久远了,不再提供回复功能。博客访问: 520299
博文数量: 119
注册时间:
问题比答案重要!
见识比信息重要!
ITPUB论坛APP
ITPUB论坛APP
APP发帖 享双倍积分
IT168企业级官微
微信号:IT168qiye
系统架构师大会
微信号:SACC2013
分类: Linux
Level 0 级是各增量的基础,那level 1 与level 2有什么不同呢?分两种情况,incremental的和cumulitive的,前者备份跟自己同级或比自己级别低的,后者只备份比自己级别低的前者:level1备份上一次level1或level0以来的变化,level2备份上一次level2或level1或level0以来的变化后者:level1备份上一次level0以来的变化,level2备份上一次level1或level0以来的变化
incremental:增量cumulitive:累计
阅读(4443) | 评论(0) | 转发(0) |
相关热门文章
给主人留下些什么吧!~~
学习一下。
请登录后评论。关于oracle rman0级备份和 full backup 的区别_百度知道
关于oracle rman0级备份和 full backup 的区别
我有更好的答案
用全备份(full )的方式当然可以进行全库的恢复。0级备份可以做为增量备份的基础,full备份不行,其余的一样。
采纳率:95%
来自团队:
为您推荐:
换一换
回答问题,赢新手礼包
个人、企业类
违法有害信息,请在下方选择后提交
色情、暴力
我们会通过消息、邮箱等方式尽快将举报结果通知您。}

我要回帖

更多关于 oracle rman全库备份 的文章

更多推荐

版权声明:文章内容来源于网络,版权归原作者所有,如有侵权请点击这里与我们联系,我们将及时删除。

点击添加站长微信