Patent attributes
A storage layer for a non-volatile storage device presents a large, logical address space having a logical capacity that may exceed the storage capacity of the non-volatile storage device. The storage layer implements persistent storage operations within the logical address space; storage operations performed within the logical address space may be persisted on the non-volatile storage device. The storage layer maintains storage metadata to allocate ranges of the logical address space to storage entities. The storage layer provides for allocation of contiguous logical address ranges, which may be implemented by segmenting logical identifiers into a first portion referencing storage entities, and a second portion referencing storage entity offsets. The storage layer persists data on the non-volatile storage device in a sequential, log-based format. Accordingly, storage clients, such as file systems, databases, and other applications, may delegate logical allocations, physical storage bindings, and/or crash-recovery to the storage layer.
