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.
Windows Azure存储Azure存储得到了改善，具备了透明复制功能，这会为属于同一区域的blob和表在不同位置创建备份。
Windows Azure Storage. Azure Storage is now enhanced with transparent replication which creates backups of blobs and tables in different locations belonging to the same region.
备份实用程序在到达磁盘之前在缓冲区中压缩数据。
The backup utility compresses the data before hitting the disk, in the buffer.
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