Griffiths & Seaton PLLC
Retrieving data in a storage system using thin provisioning
The invention relates to retrieving data from a storage system. One embodiment of the invention comprises receiving a write operation, establishing a correspondence relationship between a logic block address and a physical block address of the write operation, and determining whether a valid data percentage in a mapping table is greater than a predetermined threshold after the correspondence relationship is added in stored metadata of stored metadata.
INTERNATIONAL BUSINESS MACHINES CORPORATION
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Fan Gang Hui X. Xiao Yan Min
Zeng Gu Li Fang