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At a customer site we tried to use read on standby for reporting. That way we hoped to be able to redirect the load which is caused by reporting away from the operational DB and machine. Test failed because of some LOB-columns which couldn't be altered to complete inline lobs.
Lack of full LOB support with ROS forces us to consider much more complex scenarios like replication to a separate installation via CDC or QREP in addition to HADR for HA.
Even if you could use ROS today, there's always the risk that your third party application enhances during an upgrade its DB2 scheme with some LOB columns and renders your already running ROS-scenario useless.
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