我们还可以选择使用COMMIT或ROLLBACK选项在SQL或OS错误期间提交或回滚未提交的事务。
We can also choose to commit or roll back the uncommitted transactions during SQL or OS errors using commit or ROLLBACK options.
将分割镜像初始化为快照时，将执行崩溃恢复，回滚所有未提交的事务，并使数据库可以被所有读或写操作访问。
The initialization of the split mirror as snapshot performs a crash recovery, rolls back all uncommitted transactions, and makes the database available for any read or write operation.
崩溃恢复是对日志文件进行处理，确保所有已提交的事务被写到磁盘，所有未提交的事务被回滚。
Crash recovery is the processing of the log files, making sure all committed transactions are written to disk and uncommitted transactions are rolled back.
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