Transaction-redo-based multi-copy consistency maintaining method for heterogeneous clusters
A heterogeneous cluster, multi-copy technology, applied in the database field, can solve the problems of data inconsistency, different log formats, and the actual execution order cannot be guaranteed to be consistent, and achieves the effect of supporting heterogeneity, high availability, and fast consistency maintenance.
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 The present invention will be described in further detail below in conjunction with the accompanying drawings.
 A method for maintaining multi-copy consistency of heterogeneous clusters based on transaction redo is to use the principle that the actual execution order of concurrent transactions is the commit order of transactions. A method of propagating the sequence of statements recorded by the primary data node and organized in the order of transaction commits to the replica data nodes for transaction redo. This method can ensure that the logical operations performed on the replica data and the primary data at the transaction level are completely consistent, thereby ensuring the eventual consistency between the replica data and the primary data. Since the recording occurs in the transaction management layer of the main data node, it will not cause serialization of the cluster middleware itself, which solves the concurrency problem of the cluster; since the que...
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