| 摘要 |
Systems and techniques to pseudorandomly place and redistribute data blocks in a storage system. In general, in one implementation, the techniques include: distributing data blocks over multiple storage devices according to a reproducible pseudorandom sequence that provides load balancing across the storage devices, and determining current storage locations of the data blocks by reproducing the pseudorandom sequence. The techniques may also include: distributing data blocks over multiple storage devices according to a reproducible pseudorandom sequence, in response to initiation of a storage scaling operation, pseudorandomly redistributing a selected subset of the data blocks and saving information describing the storage scaling operation, determining current storage locations based on the pseudorandom sequence and the saved scaling operation information, and accessing the data blocks according to the determined current storage locations.
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