更新数据的另一个方法是合并备份记录。
The other option for updating data is to merge duplicate records.
通常来说，一个数据库备份是记录在这个数据库本身中的，它被视为整个链条的一部分，并可以用来进行数据库恢复。
Normally, a database backup is recorded in the database itself and is identified as part of a chain that can be used for restoration.
但是这个规则可以扩充应用到更广：当您在一个您的记录类型上创建一个新的REFERENCE或者REFERENCE _ list字段时，您可以选择自动创建一个备份引用。
But this rule goes even further: When you create a new reference or REFERENCE_LIST field on one of your record types, you have the option to automatically create a back-reference.
强健的安全和备份过程是强制性的，而且还要考虑供应商的业绩记录和历史。
Strong security and backup processes are mandatory, and you'll need to consider the provider's track record and history.
除了提供备份之外，私有映像会记录对映像的所有软件安装和配置，可以节省时间。
In addition to providing a backup, private images will save time by recording all the software installation and configuration for your image.
这项服务的前提是相对简单的：你想保护你的社交媒体数据以防灾难性的、失败的情况或是仅仅为你自己的记录作一个备份。
The service’s premise is relatively simple: you want to protect your social media data in case of chatastrophic circumstances, failure, or just to have a copy for your own records.
在同一个建筑物中对数据和记录进行备份并且运行应用程序不是什么好主意，甚至在同一个地区距离很近的两个地方进行备份也不是什么好主意。
It's not a good idea to back up data and records and to run applications in the same building — or even in a different building in close proximity on the same site.
使用db代理的备份和恢复操作将被记录下来用于审计，并默认发送给安全服务器。
Backup and restore operations with the DB agent are logged for audit and sent to the security server by default.
逻辑日志缓冲区是用来存储最后一次备份开始的逻辑日志记录的。
Logical-log buffer is used to store logical log records since last backup.
这个脚本并不适合企业环境；在企业环境中，带历史记录的增量备份更合适，但概念是相同的。
This is not intended for enterprise use-an incremental backup with history would make more sense there. The concept remains the same, though.
内含高可用性资料抄写 (HDR)功能，以便提供灾难回复与连续记录还原、时间点实例层面还原、表格层次备份及回复。
Includes a high-availability data replication (HDR) feature for disaster recovery and continuous log restore, point-time instance-wide restore, and table-level backup and recovery.
您也应该记录当前的配置并进行数据备份。
You should also take notes on your current configuration and prepare a backup of your data.
最佳策略是制定一份详细的迁移计划，记录对稳定状态的更改，选择一种备份解决方案并了解回滚和恢复说明，这一切将有助于最小化停机时间，从而最大化您的工作成果。
Keeping a migration plan, documenting changes to stable states, having a backup solution, and having rollback and recovery instructions will help minimize your downtime and maximize your results.
当发出“AlterTablespace ts_nameEndBackup”时，在联机备份数据文件的的文件头中再次记录了检查点scn。
When Alter Tablespace ts_name End backup is issued, again a checkpoint SCN is recorded at the headers of online backup data files.
您可以使用tar来创建一个系统备份，该文件系统将压缩到一个可记录的DVD上，然而，现在大多数系统的用户数据非常庞大，一个DVD不能存下。
You may be able to use tar to create a system backup that will fit on a recordable DVD, once compressed; however, most modern systems have enough user data that a single DVD won't hold it all.
如果需要执行恢复，可以看一看ON - Bar备份的旧逻辑记录文件，以确定问题所在。
If you need to perform a restore, you can view the old logical-log files that were backed up by ON-Bar to find out the exact problem.
您应该尝试使用速度较快的磁盘用于此类数据的保存，并且有经常性地备份和删除该表格中的记录。
You should try to use the fastest disc you have for this kind of data and also regularly back up and delete the entries in this table.
注意，如果决定使用循环日志记录和脱机恢复作为您的备份策略，那么最后一次脱机备份以后的所有事务都将丢失。
Be aware that if you decide to use circular logging and offline recovery as your backup strategy, all transactions after the last offline backup will be lost.
如果您正在使用循环日志记录，脱机备份是惟一受支持的备份类型。
If you are using circular logging, offline backup is the only type of backup supported.
如果您选择使用归档日志记录，并执行联机备份和前滚恢复，那么您可以恢复到数据丢失最少的那个时间点，或者恢复到结束日志的时候。
If you choose to have archive logging, and do an online backup and roll forward recovery, you can recover to a point in time or to the end of the logs for the minimum loss of data.
RETAIN意味着日志记录不再是循环的，而是归档的，因此需要在继续设置之前进行一次初始备份。
RETAIN means that the logging is no longer circular but archival, and therefore you need to have an initial backup before you continue.
在该场景的某一个步骤中，您在更改了日志记录选项后，对数据库执行完全离线备份。
During one of the steps of the scenario, you perform a full offline backup of the database after changing the logging option.
您可以在数据库上启用归档日志记录模式，并开始联机备份数据库以及备份数据库中的一组表空间。
You can enable archive logging mode on the database and start taking online backups of the database as well as backups of a set of table Spaces in the database.
我们需要在离线设备中对邮件、消息和记录进行备份。
You need to back up your mail, messages, and records at an off-site facility.
您需要执行完全离线备份，因为在更改日志记录类型后，为了以后能执行时间点恢复，需要这种类型的备份。
You need to perform a full offline backup because after changing the logging type, this type of backup is required in order to later be able to perform a restore to point in time.
为了使用联机备份，必须打开归档日志记录。
In order to use online backup, archive logging must be turned on.
在数据库处于循环日志记录模式时，单个表空间的备份不受支持。
Backing up individual table Spaces is not supported while the database is in circular logging mode.
如果数据库处于循环日志记录模式，只允许脱机备份数据库。
If the database is in a circular logging mode, only offline backup of the database is allowed.
服务器失败将造成灾难性后果，因为没有正式的或记录好的过程用于自动备份相关服务器系统。
Server failures will have catastrophic consequences, since no formal and documented procedure exists for automated backups of relevant server systems.
差异化部分备份——差异化部分备份仅记录自上一次部分备份以来文件组中发生更改的数据区。
Differential partial backup — This backup only records data that has changed in the filegroups since the preceding partial backup.
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