在系统失败时，事务日志可以应用或取消失败时没有写入磁盘的那些事务。
In the event of a system failure, transaction log recovery can apply or undo only those transactions not written to disk at the time of the failure.
您的日志至少应该跟踪所有的升级和软件修复(应用于系统中的每个软件组件)，包括基础结构产品和应用程序代码。
Your log should at least track all upgrades and software fixes applied in every software component in the system, including both infrastructure products and application code.
或者，也许这种数据正在写入一个应用程序或者系统日志。
Or perhaps it is already being written to an application or the system logs.
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