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。

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There were far few marchers, but demonstrators did manage to fill 10 city blocks, waving American and Mexican flags and chanting familiar slogans.

NPR: May Day Immigration Marches Lose Some Steam