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MANAGEMENT OF EXTENT BASED METADATA WITH DENSE TREE STRUCTURES WITHIN A DISTRIBUTED STORAGE ARCHITECTURE
MANAGEMENT OF EXTENT BASED METADATA WITH DENSE TREE STRUCTURES WITHIN A DISTRIBUTED STORAGE ARCHITECTURE
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机译:分布式存储架构中具有密集树结构的基于范围的元数据管理
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摘要
In one embodiment, a node coupled to one or more storage devices executes a storage input/output (I/O) stack having a volume layer. The volume layer manages volume metadata embodied as mappings from offsets of a logical unit (LUN) to extent keys associated with storage locations for extents on the one or more storage devices. Volume metadata is maintained as a dense tree metadata structure representing successive points in time. The dense tree metadata structure has multiple levels, wherein a top level of the dense tree metadata structure represents newer volume metadata changes and descending levels of the dense tree metadata structure represent older volume metadata changes. The node accesses a latest version of changes to the volume metadata by searching from the top level to the descending levels in the dense tree metadata structure.
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