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An article can’t be distributed individually.A group of articles is called publication.An article can be filtered when sent to the subscriber.Articles are the actual database objects included in replication like tables, views, indexes, etc.Publishers define what they publish through a publication.It is a source database where replication starts.Let us look at each of the individual components in detail. SQL Server replication is based on the “Publish and Subscribe” metaphor. To move data, create solutions using change data capture and SSIS. Heterogeneous replication to non-SQL Server subscribers is deprecated.Republishing is not supported when replication is combined with AlwaysOn.
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In an AlwaysOn Availability Group, an AlwaysOn secondary cannot be a publisher.The publisher instances must share a common distributor. A publication database can be part of an availability group.Replication supports the following features on Availability groups:.Four new stored procedures provide replication support for AlwaysOn.Updatable subscriptions with transactional publications are discontinued.Time to deliver 100000 varbinary(max) records in less than 2minutes where in 2005 223 minutes.Snapshot delivery of more than 500MB/minute.
#Step by step collabora online server windows
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Unlike other methods of high availability, it doesn’t distribute entire database, but only distributes some part of database like tables or views. Replication is a set of technologies for copying and distributing data and database objects from one database to another and then synchronizing between databases to maintain consistency. It is object level high availability feature. Changes made at different user locations are synchronized to the main server. Log shipping and mirroring allows to maintain complete database redundancy whereas replication allows to maintain some part of the database (a set of required objects) at users location. Replication allows to maintain same database multiple copies at different locations. To overcome all the above problems, we can use replication solution. Earlier, most of the applications were using standalone environment where a single centralized server was responding to multiple users, working in different locations.