DOC-4852 added RDI heartbeat mechanism info #1190
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andy-stark-redis
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| and catch up with processing them. However, Oracle internally discards its SCN | ||
| information after a certain period of time. If RDI's last recorded SCN has been | ||
| discarded by the Oracle database, then there is no way to detect which | ||
| events have happened since the collector was stopped, and change data may be |
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@andy-stark-redis What you wrote is correct. We just need to add a bit more to it. The SCN deletion issue can happen even if RDI is up and running all the time, but in Oracle, many changes have happened, but no changes on the monitored tables have happened.
I think it's important to note that as well, otherwise one might think that there might only be a problem if the pipeline was stopped.
@yaronp68 correct me if I'm wrong.
ZdravkoDonev-redis
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Feb 23, 2025
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DOC-4852 (refers to RDSC-3207).
I've tried to find out a bit about Oracle SCNs to help the explanation. Let me know if I've got any details wrong or if this is too much information. Also, are we OK with this info in the config reference or is there a better place for it?