To simplify tasks associated with remote journaling, MIMIX implements the concept of a remote journal link. A remote journal link (RJ link) is a configuration element that identifies an IBM i remote journaling environment. An RJ link identifies:
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A “source” journal definition that identifies the system and journal which are the source of journal entries being replicated from the source system.
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A “target” journal definition that defines a remote journal.
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Primary and secondary transfer definitions for the communications path for use by MIMIX.
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Whether the IBM i remote journal function sends journal entries asynchronously or synchronously.
Once an RJ link is defined and other configuration elements are properly set, user journal replication processes will use the IBM i remote journaling environment within its replication path.
The concept of an RJ link is integrated into existing commands. The Work with RJ Links display makes it easy to identify the state of the IBM i remote journaling environment defined by the RJ link.
Sharing RJ links among data groups: It is possible to configure multiple data groups to use the same RJ link. However, data groups should only share an RJ link if they are intended to be switched together or if they are non-switchable data groups. Otherwise, there is additional communications overhead from data groups replicating in opposite directions and the potential for journal entries for database operations to be routed back to their originating system. See RJ link considerations when switching for more details.
RJ links within and independent of data groups: The RJ link is integrated into commands for starting and ending MIMIX and replication processes. Start operations will automatically start the RJ link if necessary. Operations that end MIMIX or replication processes provide the option to end the RJ link.
Two MIMIX commands provide the ability to use an RJ link without performing data replication. The Start Remote Journal Link (STRRJLNK) and the End Remote Journal Link (ENDRJLNK) commands provide this capability.