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Things to keep in mind when using HyperDB database duplexing in WordPress
When building a commercial website with WordPress, it is common to separate the web application server from the database server and duplex the database side. It is simply to improve the performance of the service by distributing the load on database access, and in the sense that the main database can be recovered from the database of the mirrored secondary node in the event of a failure, it is the worst case for the service...
