{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-10540113","patent":{"patent_number":"US-10540113","title":"Extent migration in multi-tier storage systems","assignee":null,"inventors":[],"filing_date":"2018-11-28T00:00:00.000Z","publication_date":"2020-01-21T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F","G06F","G06F"],"num_claims":20,"abstract":"Migrating data in a tiered storage system. The tiered storage system includes an upper tier with at least one storage device and a lower tier with at least one storage device. Data on a storage device includes one or more extents, and each extent contains one or more grains. I/O activity of grains is recorded during a predefined time interval. For each extent, a mean heat value over grains in the extent during the predefined time interval is calculated from the recorded I/O activity, where a heat value is a numerical indication of frequency of access of a grain, and a spike heat indicator, which measures non-uniformity of heat values of grains in the extent is calculated. Two extents with mean heat values that differ at most by a predefined threshold are identified, and the extent with a greater spike heat indicator is migrated to an upper tier."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Extent migration in multi-tier storage systems","description":"Migrating data in a tiered storage system. The tiered storage system includes an upper tier with at least one storage device and a lower tier with at least one storage device. Data on a storage device","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-10540113","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-10540113","citation_suggestion":"Patentable. \"Extent migration in multi-tier storage systems\" (US-10540113). https://patentable.app/patents/US-10540113","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-10540113","json":"https://patentable.app/api/llm-context/US-10540113","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T10:00:24.860Z"}