  This paper presents a new solution, which adds a new database server on an
existing Oracle Multimaster Data replication system with Online Instantiation
method. During this time the system is down, because we cannot execute DML
statements on replication objects but we can only make queries. The time for
adding the new database server depends on the number of objects, on the
replication group and on the network conditions. We propose to add a new layer
between replication objects and the database sessions, which contain DML
statements. The layer eliminates the system down time exploiting our developed
packages. The packages will be active only during the addition of a new site
process and will modify all DML statements and queries based on replication
objects.
