What is required for a successful backup of all files during hoi backup?
There is a typo in the body of this question. It should be “Hot” instead of “hoi”.
Material:
Backup Methods
==============
Hot backup and cold backup are the two methods deployed for a backup.
They are based on the state of the application when the backup is performed.
In a hot backup, the application is up-and-running, with users accessing their data during the backup process. This method of backup is also referred to as an online backup.
A cold backup requires the application to be shut down during the backup process. Hence, this method is also referred to as an offline backup.
The hot backup of online production data is challenging because data is actively used and changed. If a file is open, it is normally not backed up during the backup process. In such situations, an open file agent is required to back up the open file. These agents interact directly with the operating system or application and enable the creation of consistent copies of open files. In database environments, the use of open file agents is not enough, because the agent should also support a consistent backup of all the database components. For example, a database is composed of many files of varying sizes occupying several file systems. To ensure a consistent database backup, all files need to be backed up in the same state. That does not necessarily mean that all files need to be backed up at the same time, but they all must be synchronized so that the database can be restored with consistency. The disadvantage associated with a hot backup is
that the agents usually affect the overall application performance.
Answer:
C. Open file agent.
What is required for a successful backup of all files during hoi backup?的更多相关文章
- ORA-01146: cannot start online backup - file 1 is already in backup ORA-01110: data file 1: 'C:\ORACLE\ORADATA\ORCL8\SYSTEM01.DBF'
问题: Error: [1146] ORA-01146: cannot start online backup - file 1 is already in backup ORA-01110: dat ...
- [PowerShell] Backup Folder and Files Across Network
## This Script is used to backup folder/files and delete the old backup files. ## Author: Stefanie # ...
- Symantec Backup Exec 2012 Agent For Linux安装
Backup Exec 2012 介绍 Backup Exec 2012 是一种为虚拟和物理环境提供保护的集成产品,能够简化备份和灾难恢复,并提供了无可匹敌的恢复功能.借助于强大的 Symantec ...
- How to restore and recover a database from an RMAN backup. (Doc ID 881395.1)
APPLIES TO: Oracle Database - Enterprise Edition - Version 10.1.0.2 to 11.2.0.2 [Release 10.1 to 11. ...
- Symantec Backup Exec 2010 Agent For Linux安装
以前写过一篇文章介绍过Symantec Backup Exec 2012 Agent For Linux安装安装,今天介绍一下Symantec Backup Exec 2010 Agent For L ...
- IO is frozen on database xxx, No user action is required
最近遇到一起关于"I/O is frozen on database xxx. No user action is required. However, if I/O is not resu ...
- SQL Server 2014 Backup Encryption
转载自: Microsoft MVP Award Program Blog 来源:Microsoft MVP Award Program Blog 的博客:https://blogs.msdn.mic ...
- [每日一题] 11gOCP 1z0-053 :2013-10-9 backup with the KEEP option....................................33
转载请注明出处:http://blog.csdn.net/guoyjoe/article/details/12517603 正确答案:AB 在Oracle 11g中,可以使用backup ….keep ...
- SharePoint 2013 How to Backup Site Collection Automatically With a PowerShell Script
In this post I will introduce a way how to run a script for backing up SharePoint data which could b ...
随机推荐
- LeetCode212. Word Search II
https://leetcode.com/problems/word-search-ii/description/ Given a 2D board and a list of words from ...
- NYOJ 116 士兵杀敌二
士兵杀敌(二) 时间限制:1000 ms | 内存限制:65535 KB 难度:5 描述 南将军手下有N个士兵,分别编号1到N,这些士兵的杀敌数都是已知的. 小工是南将军手下的军师,南将军经常 ...
- python读写hdf5及cdf格式文件
Python write and read hdf5 file http://stackoverflow.com/questions/20928136/input-and-output-numpy-a ...
- 对于mysql加索引,删除索引,添加列,删除列,修改列顺序的最佳办法测试
1.首先进行数据训的XltraBackup备份,有备无患,切记切记! 2.mysql -uroot -pD******** -- 导出csv文件 use dsideal_db; MariaDB [ds ...
- 修改Struts2的struts.xml配置文件位置
默认情况下,Struts2的配置文件名称为struts.xml,且该文件放在src根目录下.如下图所示: 如果需要修改struts.xml的位置,例如把struts.xml放到struts2文件夹下, ...
- lr计算程序执行消耗时间的比较:
去除程序执行的两种方式: 1.通过一个事务:在需要消除的代码段,使用lr_wasted_time(wasteTime); querySubmit() { char newStr4[10000]=&qu ...
- shell日志重定向到null
用输出重定向符号> 即可,格式如下:shell命令 >/dev/null 若要将标准错误输出也一并重定向,如下:shell命令 >/dev/null 2>&1这样就不管 ...
- 【面试题】整理一下2018年java技术要领
整理一下2018年java技术要领 基础篇 基本功 面向对象的特征 final, finally, finalize 的区别 int 和 Integer 有什么区别 重载和重写的区别 抽象类和接口有什 ...
- MS SQL Server迁移至Azure SQL
SQL Server的数据目前是存在于公司服务器的,现时需要将它迁移至Azure SQL 迁移分两种 数据库结构复制 数据库结构复制与数据迁移至Azure SQL 第1种方法针对的是将现有数据库创建新 ...
- Word Ladder(LintCode)
Word Ladder Given two words (start and end), and a dictionary, find the length of shortest transform ...