For unidirectional Q subscriptions, the Q Capture and Q
Apply programs support full interoperability between Version 9.7,
Version 9.5, Version 9.1, and Version 8.2.
The initialization protocol for peer-to-peer and bidirectional
replication changed with Version 9.7, so that replication does not
pause while all Q subscriptions are being activated. Because of this
change, if any of the Q Capture or Q Apply programs in the configuration
are migrated to Version 9.7 and you need to add a new Q subscription
or activate a disabled Q subscription, all of the Q Capture and Q
Apply programs in the configuration must be at Version 9.7. Active
Q subscriptions are not affected.
After you install a Version 9.7 Q Replication or Event Publishing
program on the system where Q Capture runs, you migrate the Q Capture
control tables to Version 9.7. You might need to change the value
of the compatibility parameter depending on the
version of your Q Apply program or programs.
Important: The compatibility level of the Q Capture server
must be lower than or at the same level as the architecture level
of the consuming Q Apply program's control tables.
New functions that are introduced in Version 9.7 are not enabled
until both the Q Capture and Q Apply control tables are migrated to
Version 9.7.
Figure 1 shows relationships
between Version 8 and Version 9 replication programs and the effect
of the compatibility parameter.
Figure 1. Effect of compatibility parameter on level
of messages sent from Q Capture to Q Apply
Other coexistence features for Version 9.7
The
following list details other coexistence features of Version 9.7 Q
Replication and Event Publishing:
- ASNCLP and Replication Center
- You can use replication administration tools at the Version 9.7
level to manage Version 9.7, Version 9.5, Version 9.1, and Version
8.2 Q Replication and Event Publishing environments. If your tools
are at Version 8, you can use them only to manage Version 8 environments.
- Replication Alert Monitor
- If you are using a Monitor program from Version 8, you must migrate
to a Version 9.5 Monitor to work with Version 9.5 or newer replication
and Event Publishing programs. A Monitor program at Version 9.7, Version
9.5, or Version 9.1 can work with Version 9.7, Version 9.5, Version
9.1, or Version 8.2 replication and Event Publishing programs.
- Queue formatting program
- The Version 9.7 asnqmfmt program can format and display Version
9.7, Version 9.5, Version 9.1, and Version 8.2 messages.
- Q Analyzer program
- The Version 9.7 asnqanalyze program works with Version 9.7, Version
9.5, Version 9.1, and Version 8.2 Q Replication and Event Publishing
control tables.
- Table differencing and repair programs
- The Version 9.7 asntdiff and asntrep programs work with source
and target tables in Version 9.7, Version 9.5, Version 9.1, and Version
8.2 DB2® servers.
Note: None of the utilities supports forward compatibility.
For example, a V8.2 Monitor program or V8.2 asnqanalyze program cannot
handle V9.7 replication servers.
Q Replication and Event Publishing
