{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9619158","patent":{"patent_number":"US-9619158","title":"Two-level hierarchical log structured array architecture with minimized write amplification","assignee":null,"inventors":[],"filing_date":"2014-12-17T00:00:00.000Z","publication_date":"2017-04-11T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F"],"num_claims":20,"abstract":"A mechanism is provided for coordinated garbage collection in an array controller of a two-level hierarchical log structured array architecture for a non-volatile memory array. 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 writes logical pages of data to containers in memory of the array-level storage controller at node logical block addresses in an array-level LSA. The array-level LSA maps the host logical block addresses to node logical block addresses in a node-level LSA in a plurality of nodes. Responsive to initiating array-level garbage collection in the array controller, the mechanism identifies a first container to reclaim according to a predetermined garbage collection policy. Responsive to determining the first container has at least a first valid logical page of data, the mechanism moves the first valid logical page of data to a location assigned to the same node in a target container in the memory of the array-level storage controller, remaps the first valid logical page of data in a corresponding node, and reclaims the first container."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Two-level hierarchical log structured array architecture with minimized write amplification","description":"A mechanism is provided for coordinated garbage collection in an array controller of a two-level hierarchical log structured array architecture for a non-volatile memory array. The two-level hierarchi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9619158","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9619158","citation_suggestion":"Patentable. \"Two-level hierarchical log structured array architecture with minimized write amplification\" (US-9619158). https://patentable.app/patents/US-9619158","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9619158","json":"https://patentable.app/api/llm-context/US-9619158","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T04:10:33.241Z"}