Statement-based replication depends on compatibility【kəmˌpætəˈbɪləti(尤指计算机及程序的)兼容性,相容性;相容;并存;和睦相处;】 at the SQL level between the source and replica. In other words, successful statemen
theknodes with closest ID to the object ID are chosen as replication points. In addition, PAST nodes may cache data objects if they have unused memory space to contribute. Each time an object request passes by a node (meaning, the node is on the path between the requester and one of th...
In previous versions, both of these variables could only be configured using the appropriate option at server start, meaning that changes to the replication mode required a server restart. In all versions gtid_mode could be set to ON or OFF, which corresponded to whether GTIDs were used to ...
After an unexpected halt of a replica, upon restart the replication SQL thread must recover information about which transactions have been executed already. The information required for recovery is stored in the replica's applier metadata repository. From MySQL 8.0, this repository is created by defa...
meaning GTID auto-positioning can be used without re-acquiring filtered out transactions each time. In the case where the downstream replica is multi-source and receives the same transaction from multiple sources in a diamond topology, the downstream replica now has multiple versions of the transacti...
Object-relational database: It’s an object-relational database management system (ORDBMS), meaning it goes beyond traditional relational databases by supporting object-oriented concepts like table inheritance. ACID compliance: The system is fully ACID-compliant, ensuring atomicity, consiste...
PGD supports partitioned tables transparently, meaning that you can add a partitioned table to a replication set. Changes that involve any of the partitions are replicated downstream. Note When partitions are replicated through a partitioned table, the statements executed directly on a partition are...
Replication Methods in SQL Server Three types of replication can be implemented in SQL Server 2000: snapshot replication, merge replication, and transactional replication. Depending on your application and data requirements, you might choose only one of these types or any combination of them. Transact...
Instead of copying the WAL files to a safe location, it can instead be copied to another machine where another PostgreSQL server is running. This server can be configured to be in “recovery mode”, meaning all it does is to apply any new WAL files that it gets. This second server then...
A node may start proposing no_ops for instances belonging to other nodes, meaning that event_horizon * NSERVERS instances may be involved. However, for the time being, proposing a no_op for an instance will not mark it as busy. This may change in the future, so a safe upper limit on...