通过磁盘复制系统，将捕获主要数据中心的状态数据的快照并以异步方式传输到灾难数据中心。
With this disk replication system, snapshots of the state of the primary data center are captured and asynchronously transferred to the disaster data center.
如果修改了源文件系统，那么数据块的原始内容将复制到快照文件系统的磁盘空间区域。
If the source is modified, the original contents of the blocks are copied to the disk space area of the snapshot file system.
快照操作执行迅速，仅需要很少的磁盘空间。
The snapshot operation executes quickly and requires very little disk space.
数据库使问题复杂化，因为它缓存了一些磁盘写操作，这可能会生成一个不一致的快照。
A database complicates the matter, because it caches some disk writes, which may result in an inconsistent snapshot.
如果源文件系统没有修改，快照不会在其自己的物理磁盘空间中存储任何文件，并且具有的内容与原始文件系统相同。
If the source is not modified, the snapshot does not store any of the files in its own physical disk space and has the same content as the original file system.
磁盘子系统，可以捕获主要数据中心中的数据的快照，并将复制到灾难数据中心。
A disk subsystem that can capture a snapshot of your data in your primary data center and replicate it to your disaster data center.
将最后的良好快照恢复到将用于恢复数据中心的磁盘。
Restore the last good snapshot to the disks that will be used for the recovery data center.
可以通过表空间快照来决定是否将数据真正写入磁盘。
You can use table space snapshots to determine if the data is ever actually written to disk.
目前NILFS的主版本是第2版，即NILFS2。NILFS2实现了在线的垃圾回收，在保持多个快照的同时回收磁盘空间。
The current major version of NILFS is version 2, which is referred to as NILFS2. NILFS2 realized online garbage collection that reclaims disk space with keeping multiple snapshots.
NILFS2实现了在线的垃圾回收，在保持多个快照的同时回收磁盘空间。
NILFS2 realized online garbage collection that reclaims disk space with keeping multiple snapshots.
包含恢复点的磁盘的快照应该同时备份到本地系统中的磁盘和位于一个不同的远程位置的另一个磁盘。
Snapshots of the disks containing resumption points should be backed up on both the disk in the local system and to another disk at a different, remote location.
使用快照卷作为磁盘映像生成一个新的虚拟机。
Spawn a new virtual machine using the Snapshot volume as the disk image.
如果要管理多个大型快照，最好监控快照的使用情况，以确定它们是否在增长，以及它们是否需要更多磁盘空间。
If you have several large snapshots to manage, then it is a good idea to monitor the usage of your snapshots to determine if they are growing and if they require more disk space.
在修改快照时，它从原始文件系统获取数据（如果原始文件系统未修改），或者从它自己的磁盘存储获取数据（如果原始文件系统被更改）。
When the snapshot is modified, it either retrieves the data from the original file system (if it is not modified) or it retrieves it from its own disk storage (if the original was changed).
磁盘上数据的状态可能不可用，因为捕获快照时，磁盘上的数据被视为处于崩溃一致状态。
The state of the data on a disk may not be useable because when the snapshot was taken the data on the disk was considered to be crash consistent.
也就是说，恢复到快照的磁盘上的数据与操作系统崩溃前磁盘上的数据接近。
In other words, the data on a disk that is restored to a snapshot looks like the data on a disk after an operating system crash.
由于数据库快照不是冗余存储，因此，它们不会防止磁盘出现错误或其他类型的损坏。
Because database snapshots are not redundant storage, they do not protect against disk errors or other types of corruption.
当一个快照所采用的，稀少的文件占用了很少的磁盘空间。
When a snapshot is taken, the sparse file takes up little disk space.
从单盘失效到多盘失效详细的介绍了磁盘阵列快照系统的数据恢复策略，实现了整个系统的高效恢复。
The strategy of data recovery from single disk to multi disks introduced in this paper achieves the high efficiency of the system restoration.
从单盘失效到多盘失效详细的介绍了磁盘阵列快照系统的数据恢复策略，实现了整个系统的高效恢复。
The strategy of data recovery from single disk to multi disks introduced in this paper achieves the high efficiency of the system restoration.
应用推荐