Nonstop Database, HiRDB Version 9 Description
Linking to HiRDB Datareplicator and HiRDB Dataextractor allows you to use the replication facility. The replication facility provides the ability to duplicate the content of a distributed database into another database. Using the replication facility, you can duplicate information from one database into another database on a different system, which helps support the management of data in a distributed system environment. The replication facility includes the following two modes:
The data linkage facility causes the updates to a database residing on a mainframe DBMS or a HiRDB system to be reflected automatically in HiRDB databases at local nodes. The data linkage facility requires the HiRDB Datareplicator, which is a related HiRDB product. The data linkage facility has the following characteristics:
The database extraction/reflection service facility transfers data stored in a mainframe DBMS or another HiRDB system to HiRDB databases at local nodes. The database extraction/reflection service facility requires HiRDB Dataextractor, which is a related HiRDB product. The database extraction/reflection service facility has the following characteristics:
The following figure shows an example of using the replication facility.
Figure 2-5 Example of using the replication facility
For details about application examples of the replication facility, see the HiRDB Datareplicator Version 8 Description, User's Guide and Operator's Guide, and the HiRDB Dataextractor Version 8 Description, User's Guide and Operator's Guide.
The data linkage facility requires HiRDB Datareplicator. The database extraction/reflection service facility requires HiRDB Dataextractor, except when the remote system is RDB1 E2 or PDM II E2 of VOS1.
The following table lists DBMS products that can be linked to HiRDB by means of the replication facility.
Table 2-1 Products that can be linked to HiRDB by means of the replication facility
Linkable DBMS product (and applicable operating system) | Required replication facility product | |
---|---|---|
Data linkage | Database extraction/reflection service facility | |
XDM/RD E2 (VOS3) | XDM/DS | XDM/XT |
XDM/SD E2 (VOS3) | ||
ADM (VOS3) | VOS3 Database Datareplicator or XDM/DS | |
PDM II E2 (VOS3)#1 | VOS3 Database Datareplicator or XDM/DS | |
File transfer program#2 | ||
PDM II E2 (VOS1) | File transfer program#2 | PDM II Dataextractor |
TMS-4V/SP (VOS3) | VOS3 Database Datareplicator or XDM/DS | XDM/XT |
RDB1 E2 (VOS1) | File transfer program#2 | RDB1 Dataextractor |
#1: In the case of PDM II E2 of VOS3, it is possible to perform data linkage using a data linkage product at the same time data linkage is being performed using a file transfer program.
#2: Both XFIT and an XFIT-related product are needed for the file transfer program. For details, see the HiRDB Datareplicator Version 8 Description, User's Guide and Operator's Guide.
When the data linkage facility is used (in conjunction with extracting data for updating HiRDB databases), the following system definition operands must be specified:
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