最后，放置组到对象存储设备的映射是一个伪随机映射，使用一个叫做Controlled Replication Under Scalable Hashing (CRUSH)的算法。

Finally, the mapping of the placement group to object storage devices is a pseudo-random mapping using an algorithm called Controlled Replication Under Scalable Hashing (CRUSH).

youdao

外部服务来源，不管它来是自一个不同的用户还是开发者，是来自一个不同的词典还是随机在互联网上发现的某个网页，都能解释映射信息。

An outside source, whether it be a different user or developer, a separate thesaurus, or even a random fact found on someone else's web page, can express mapping information.

youdao

这样一来，放置组(以及副本)到存储设备的映射就不用依赖任何元数据，而是依赖一个伪随机的映射函数。

In this way, mapping of placement groups (and replicas) to storage devices does not rely on any metadata but instead on a pseudo-random mapping function.

youdao