{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9690823","patent":{"patent_number":"US-9690823","title":"Synchronizing copies of an extent in an append-only storage system","assignee":null,"inventors":[],"filing_date":"2014-09-25T00:00:00.000Z","publication_date":"2017-06-27T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F"],"num_claims":20,"abstract":"A append-only data storage system that stores sets of data blocks in extents that are located in storage devices. When an extent becomes full, the system changes the extent from an open state, wherein data can be appended to the extent, to a closed state, wherein data cannot be appended to the extent. This change involves performing a synchronization operation by: obtaining a list of data blocks in the extent from each storage device that has a copy of the extent; forming a union of the lists; looking up data blocks from the union in a database that maps data blocks to storage devices and extents to determine which data blocks belong in the extent; and if a copy of the extent is missing data blocks that belong in the extent, performing a remedial action before changing the extent from the open state to the closed state."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Synchronizing copies of an extent in an append-only storage system","description":"A append-only data storage system that stores sets of data blocks in extents that are located in storage devices. When an extent becomes full, the system changes the extent from an open state, wherein","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9690823","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-9690823","citation_suggestion":"Patentable. \"Synchronizing copies of an extent in an append-only storage system\" (US-9690823). https://patentable.app/patents/US-9690823","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9690823","json":"https://patentable.app/api/llm-context/US-9690823","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:51:34.433Z"}