Invention Grant
US08578094B2 Full-stripe-write protocol for maintaining parity coherency in a write-back distributed redundancy data storage system
失效
用于在写回分布式冗余数据存储系统中维持奇偶校验一致性的全条带写协议
- Patent Title: Full-stripe-write protocol for maintaining parity coherency in a write-back distributed redundancy data storage system
- Patent Title (中): 用于在写回分布式冗余数据存储系统中维持奇偶校验一致性的全条带写协议
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Application No.: US13585198Application Date: 2012-08-14
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Publication No.: US08578094B2Publication Date: 2013-11-05
- Inventor: David D. Chambliss , James L. Hafner , Tarun Thakur
- Applicant: David D. Chambliss , James L. Hafner , Tarun Thakur
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Sherman & Zarrabian LLP
- Agent Kenneth L. Sherman, Esq.; Michael Zarrabian, Esq.
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F13/00 ; G06F13/28
Abstract:
Data storage reliability is maintained in a write-back distributed data storage system including multiple nodes. Information is stored as a stripe including a collection of a data strips and associated parity strips, the stripe distributed across data and parity nodes. Each data node maintains the data strip holding a first copy of data, and each parity node maintains a parity strip holding a parity for the collection of data strips. A driver node initiates a full-stripe-write parity update protocol for maintaining parity coherency in conjunction with other nodes, to keep the relevant parity strips coherent. Parity is determined directly by computing parity strips for all data strips of a stripe. Any node may function as a driver node.
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