发明名称 |
Redundant data assigment in a data storage system |
摘要 |
The present invention provides techniques for assignment and layout of redundant data in data storage system. In one aspect, the data storage system stores a number M of replicas of the data. Nodes that have sufficient resources available to accommodate a requirement of data to be assigned to the system are identified. When the number of nodes is greater than M, the data is assigned to M randomly selected nodes from among those identified. The data to be assigned may include a group of data segments and when the number of nodes is less than M, the group is divided to form a group of data segments having a reduced requirement. Nodes are then identified that have sufficient resources available to accommodate the reduced requirement. In other aspects, techniques are providing for adding a new storage device node to a data storage system having a plurality of existing storage device nodes and for removing data from a storage device node in such a data storage system.
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申请公布号 |
US2008046779(A1) |
申请公布日期 |
2008.02.21 |
申请号 |
US20070827973 |
申请日期 |
2007.07.13 |
申请人 |
MERCHANT ARIF;FROLUND SVEND;SAITO YASUSUHI;SPENCE SUSAN;VEITCH ALISTAIR |
发明人 |
MERCHANT ARIF;FROLUND SVEND;SAITO YASUSUHI;SPENCE SUSAN;VEITCH ALISTAIR |
分类号 |
H04L1/22;G06F3/06;G06F12/00 |
主分类号 |
H04L1/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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