首页>
外国专利>
Two-level hierarchical log structured array architecture using coordinated garbage collection for flash arrays
Two-level hierarchical log structured array architecture using coordinated garbage collection for flash arrays
展开▼
机译:两级分层日志结构化数组体系结构,使用闪存数组的协同垃圾回收
展开▼
页面导航
摘要
著录项
相似文献
摘要
A mechanism is provided in an array controller of a two-level hierarchical log structured array architecture for a non-volatile memory array for coordinated garbage collection. The two-level hierarchical log structured array (LSA) architecture comprises an array-level LSA in the array controller and a node-level LSA in each node of the non-volatile memory array. The array controller maintains host logical block address (LBA) to node LBA mapping in an array controller connected to a plurality of nodes. A host data processing system issues access requests to host LBA. The mapping maps the host LBA space to a node LBA space of a plurality of nodes. The mechanism makes overprovisioned space in the node LBA space of the plurality of nodes available to the array-level LSA. The mechanism adds additional overprovisioned space at each node LBA space. The array controller initiates array-level garbage collection at the array-level LSA.
展开▼