Peer DRS is licensed on a per database
server instance basis for most
of the supported replication
modules e.g. MS SQL Server.
In the case of the MS Exchange
Server replication module, it is
licensed on a per Exchange server
instance basis.
For example, if
you are interested in replicating
all databases stored on a single
instance of MS SQL Server on a server
to another MS SQL Server instance
serving as a standby (running on a
different server or on the same
server), then you will need to
purchase a Peer DRS MS SQL Server
license for 2 database instances.
However, if you are only
interested in backing up a
single MS SQL Server instance and replicating all database changes to
one or more target servers, but don’t need to restore
the data into any MS SQL Server instance then you would
only need to purchase a license for one database instance.
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