Patent ID: 9639588
Date: 2017-05-02
CPC Classifications: G06F

Claim:
1. An operation method for a data storage system including a management node and a plurality of data nodes, comprising: receiving, by a first data node of the plurality of data nodes, a data operation message, wherein the data operation message carries a data operation type and information of a data object; querying, by the first data node, a state parameter of the data object, wherein the state parameter is allocated to the first data node by the management node, the state parameter is used to indicate whether the data object is updated to a latest version; acquiring, by the first data node, information of a second data node storing the data object with a state parameter indicating that the data object is updated to the latest version from a node state table saved by the first data node when the state parameter indicates the data object in the first node is not updated to the latest version, wherein the node state table records data saved by each data node and a state parameter corresponding to the saved data; and sending, by the first data node, a read operation message to the second data node to read the data object from the second data node when the operation type is a read operation, wherein the read operation message comprises the information of the data object.