Data will not be considered committed until a primary and a secondary both report success and the transaction logs are written to disk.
直到主副本和二级副本都报告成功,并且向磁盘写入了事务日志,它才会认为数据已经成功提交。
Logs are written in a customizable format and may be written directly to a file or to an external program.
日志使用可自定义的格式编写,并且可以直接写到一个文件或一个外部程序里。
Redo logs are written in a round-robin manner; therefore, before they are overwritten, the redo logs need to be archived either manually or automatically by kick-starting the ARCH process.
重做日志是以循环的方式写入的;因此,在重写它们之前,需要通过启动 ARCH 进程来手动或自动对重做日志进行归档。
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