文件系统通常为递增备份，这是为了最小化备份窗口和优化存储空间。
Filesystems are generally backed up incrementally to minimize the backup window and to optimize storage space.
对于SAP应用程序，DB 2完成了存储优化，可在需要时动态分配存储空间，在不需要时释放空间。
For an SAP application, DB2 accomplishes storage optimization by dynamically allocating storage space when needed and free space when not needed.
压缩通常用于优化存储空间，且可在以下任一位置处设置。
Compression is usually set to optimize storage space and can be set at any one of the following locations.
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