Block Crush 乱消方块
Because the Ceph clients implement CRUSH and do not have knowledge of the block mapping of files on the disks, the underlying storage devices can safely manage the mapping of objects to blocks.
因为Ceph客户实现CRUSH，而且对磁盘上的文件映射块一无所知，下面的存储设备就能安全地管理对象到块的映射。
Cried the giant, a creature whom I can crush between my fingers, wants to block my way.
巨人叫道，“你这小东西，我用两根手指就能把你碾碎，你还敢挡我的路？”
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