| 摘要 |
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, manage metadata for virtual volumes. In some implementations, a method and system include defining multiple metadata blocks in a persistent storage, including information that links a virtual address space to the storage system, where the defining includes, for at least one of the multiple metadata blocks, determining multiple output addresses corresponding to the storage system, and writing the multiple output addresses and an identifier corresponding to the multiple metadata blocks in a metadata block in the persistent storage. In some implementations, a method and system include reading the multiple metadata blocks into the memory from the persistent storage, including identifying the metadata block based on the identifier; receiving an input address of the virtual address space; and obtaining a corresponding output address to the storage system using the multiple metadata blocks in the memory.
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