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ingres_rollback() rolls back the currently open transaction, actualy canceling all changes made to the database during the transaction.
the behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of php.
Dernière mise à jour : 2011-10-24
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the istg creates a replication topology between sites on a site link. to make replication more efficient, one domain controller is selected to be the bridgehead server. the bridgehead server is responsible for all replication into and out of the site for a partition. for example, if a data center site contains five dcs, one of the dcs will be the bridgehead server for the domain naming context. all changes made to the domain partition within the data center will replicate to all dcs in the site. when the changes reach the bridgehead server, those changes will be replicated to bridgehead servers in branch offices, which in turn replicate the changes to dcs in their sites. similarly, any changes to the domain naming context in branch offices will be replicated from the branches’ bridgehead servers to the bridgehead server in the data center, which in turn replicates the changes to other dcs in the data center. the following figure illustrates intrasite replication within two sites and the intersite replication using connection objects between the bridgehead servers in the sites.
topologist
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