将所有日志准备好并放在手边，这对同时调试不同VM上的不同子系统故障非常有帮助。
Having all the logs at your finger tips is really useful to debug failures simultaneously across different subsystems on different VMs.
这些服务可能包括数据服务、日志服务、故障处理服务、审计、搜索、通知以及会话管理服务。
These services might include data services, logging services, fault handing services, audit, search, notification, and session management services.
要防止脱机归档日志的单点故障，比如媒介失败，则应该使用日志镜像。
To prevent a single point of failure for offline archive logs such as media failure, log mirroring shouldl be used.
通过还原脱机或联机备份并使用回滚操作来恢复日志，就可处理这些故障。
These failures are handled by restoring either offline or online backups and using roll-forward operations to recover the logs.
这个日志对故障恢复也很有用：如果元数据服务器发生故障，它的日志就会被重放，保证元数据安全存储在磁盘上。
The journal is also useful for failure recovery: if the metadata server fails, its journal can be replayed to ensure that metadata is safely stored on disk.
高速缓存必须是非易失的以确保在发生灾难性故障(例如停电)时保护日志数据。
The cache must be nonvolatile to ensure that log data is protected in the event of a catastrophic failure, such as loss of power.
当实例位于恰当的位置并运行了多次之后，就可以使用日志查明错误或使用后处理程序脚本确定性能或故障趋势。
After the instance is in place, it is then possible to use the logs to pinpoint errors or use the post-processing scripts to identify performance or failure trends over multiple runs of the instance.
使用自动选项时要求指定主存档日志路径和故障转移存档日志路径。
Using the automatic option requires you to specify primary archive log path and fail archive log path.
另外一个好习惯就是使用MIRRORLOGPATH来避免日志单点故障。
Another good practice is to use MIRRORLOGPATH to avoid single point of failure for logs.
描述了该支持如何通过另一台对等服务器恢复故障服务器的事务日志。讨论了手动和自动对等恢复适用的场景。
It described how this support enables recovery of the transaction log of a failed server by a running peer, and discussed scenarios under which manual and automated peer recovery are appropriate.
为了获得高可用性和进行故障恢复，我们推荐使用事务日志。
We recommend transaction logging for high availability and failure recovery.
像通过多路复用(放在不同的位置)控制文件使数据库免疫、使用联机重做日志和归档重做日志这样的步骤，都是避免单点故障所必需的。
Steps such as immunizing ther database by multiplexing (putting in different locations) control files, using online redo logs and archiving redo logs are necessary to avoid a single point of failure.
活动日志存储最近写入的块并确定故障恢复后应同步哪些块。
The activity log stores blocks that were recently written to and define which blocks need to be synchronized after a failure is resolved.
如果您无法使用上面的命令从LDAP创建用户或者组，那么请检查SunOne LDAP服务器日志文件，以找出导致这个故障的原因。
If you are unable to create a user or group from LDAP with the above commands, check the SunOne LDAP server log files to find out the reason for the failure.
如果Debug没有设置为true，则只有故障信息会被记录到Watchit日志文件。
Without Debug set to true, only failures are logged to the Watchit log file.
完成转换后，查看日志文件的故障信息并核实Upgradefinished ！
After the conversion is complete, review the log file for failures, and verify that Upgrade finished!
还有一个ffdc目录（它有第一个故障数据捕获数据）和一个CatalogCluster 目录（CatalogServer日志位于其中）。
There is also a ffdc directory, with first failure data capture data, and a Catalog Cluster directory, in which the Catalog Server logs are located.
常规配置和自动日志故障排除。
Troubleshooting for General Configuration and Automatic journals.
如果在DAO中遇到故障，那么日志通常可以提供判断出错位置的最好信息。
If you encounter a failure in a DAO, logs often provide the best information for understanding what went wrong.
日志应该表明故障转移中使用的设备类型和位置。
The log should indicate the type and location of the device used in the failover.
请注意，更改控制的概念，以及保存更改日志，通常比故障诊断所涉及的领域更加广泛。
Be aware that the concept of change control, and keeping a change log, is generally broader than the troubleshooting arena.
活跃日志防止在崩溃恢复(比如电源故障)期间的数据损失。
Active logs are logs that prevent lost of data during crash recovery such as power failure.
如果创建了核心文件，错误日志记录进程应该会记录一个错误日志项，这个进程常常在发生第一个软件故障时启动。
If a core file has been created, there should be an error log entry logged by the error-logging process, which is usually started when the first software failure occurs.
执行这项操作所需的时间取决于出现故障时数据库日志中“打开的”工作量。
The time required to perform this operation depends upon the amount of "open" work in the database logs at the point of failure.
如果您能够进行自动故障转移，请设想一下，如果另一个数据中心使用日志的副本启动，会怎么样呢。
If you have some kind of automatic failover, imagine what would happen if the second data center started using the copy of the logs.
组件需处理类似事件以通知用户程序，并且做适当的日志以便促进排除故障和服务监测。
Components are required to handle such events to notify client programs and also do appropriate logging to help facilitate troubleshooting and service monitoring.
因为它们都是现成的产品，所以应该可以收集到很多信息，包括日志文件、任务完成率和次数、故障率和故障点等等。
Since these are existing products you should have a wealth of info, such as, log files, completion rates and times, drop out rates and drop out points, etc.
总之，日志文件系统就是一种具有故障恢复能力的文件系统，它利用日志来记录尚未提交到文件系统的修改，以防止元数据破坏(请参见图1)。
To sum up, journaling file systems are fault-resilient file systems that use a journal to log changes before they're committed to the file system to avoid metadata corruption (see Figure 1).
当主系统出故障时，连续日志恢复特性使一个辅助系统可用，以替代主系统。
In case the primary system fails, the continuous log restore feature makes a secondary system available to replace the primary system.
如果主系统出故障，可以将剩下的可用逻辑日志恢复到辅助系统上，然后使后者上线，担任新的主系统。
If the primary system fails, the remaining available logical logs can be restored on the second system, which can then be brought online and function as the new primary system.
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