Title:
データストレージシステムにおける冗長データ割り当て
Document Type and Number:
Japanese Patent JP2007520783
Kind Code:
A
Abstract:
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.
Inventors:
Merchant Alif
Florand Svent
Yasushi Saito
Spence Susan
Beich Alistair
Florand Svent
Yasushi Saito
Spence Susan
Beich Alistair
Application Number:
JP2006533127A
Publication Date:
July 26, 2007
Filing Date:
May 13, 2004
Export Citation:
Assignee:
Hewlett-Packard Development Company
International Classes:
G06F3/06; G06F12/00; G06F12/16; H04L1/22
Attorney, Agent or Firm:
Patent Business Corporation IPS