Hi,
In addition to the use cases mentioned above, some users want to use n-way replication of partial database. The following is the typical use case. * There are several data centers. (ex. Japan and India) * The database in each data center has its unique data. (ex. the database in Japan has the data related to Japan) * There are some common data. (ex. the shipment data from Japan to India should be stored on both database) * To replicate common data, users want to use n-way replication. The current POC patch seems to support only n-way replication of entire database, but I think we should support n-way replication of partial database to achieve above use case. > I don't know if it requires the kind of code you are thinking but I > agree that it is worth considering implementing it as an extension. I think the other advantage to implement as an extension is that users could install the extension to older Postgres. As mentioned in previous email, the one use case of n-way replication is migration from older Postgres to newer Postgres. If we implement as an extension, users could use n-way replication for migration from PG10 to PG16. Regards, Ryohei Takahashi
