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Sand timer algorithm for tracking in-flight data storage requests for data replication
Sand timer algorithm for tracking in-flight data storage requests for data replication
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机译:沙漏计时器算法,用于跟踪进行中的数据存储请求以进行数据复制
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摘要
A method is disclosed comprising: generating a first snapshot of a first storage subsystem; detecting, by a management node, that all in-flight data storage requests recorded in drain tables of storage nodes in the first storage subsystem have been completed, the in-flight data storage requests recorded in the drain tables of the storage nodes being replicated in a second storage subsystem; causing, by the management node, each of the storage nodes to flip the respective designations of the tracking tables in the node's respective pair of tracking tables; and transmitting, from the management node to the second storage subsystem, an instruction which when received by the second storage subsystem causes the second storage subsystem to generate a second snapshot of the second storage subsystem.
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