International Business Machines Corporation

Chun Guang Zheng

Yuan Yuan Li

Xiao Yang

Hai Ji

A method and an apparatus for object storage are disclosed. The method includes, in response to an update to metadata of an object in an object storage region to produce updated metadata of the object, recording a metadata object associated with the object in a metadata change storage region separated from the object storage region. The metadata object includes the updated metadata of the object and pointer information. The pointer information points to a first storage location representing a storage location of the object in the object storage region. The method also includes modifying index information associated with the object to produce modified index information. The modified index information indicates the update to the metadata and a second storage location representing a storage location of the metadata object in the metadata change storage region.

Method and apparatus for object storage

A method, system, and computer program product for detecting consistency between first and second data replicas is provided. Detecting consistency between data replicas includes acquiring first characteristic information of a first data replica and second characteristic information of a second data replica, the first and second characteristic information being associated with keys of the respective first and second data replicas. Detecting consistency between data replicas further include determining, based on a predetermined threshold value of a number of determination times, whether the first characteristic information is identical to the second characteristic information of the second data replica. In response to the determining that the first characteristic information and the second characteristic information are identical, whether the first data replica is consistent with the second data replica may then be confirmed.

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Beijing, China

Chun Guang Zheng