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A comment on Do you really need Redis? How to get away with just PostgreSQL. Parent comment

Re:Do you really need Redis? How to get away with just Postg... by AtNightWeCode on Saturday June 12, 2021 @08:09AM (#27483894)
The outbox pattern. Can in many cases be solved by using topics.
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Re:Do you really need Redis? How to get away with just Postg... by aidos on Saturday June 12, 2021 @08:29AM (#27483986)
Ah ha. Yup, that’s exactly it. Thanks for the pointer.

Edit: can you explain by what you mean by solving it with topics? I thought topics were a broadcast mechanism?

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Re:Do you really need Redis? How to get away with just Postg... by AtNightWeCode on Monday June 14, 2021 @06:17PM (#27509037)
If you have the case, if A then do B and C. You can commit to a topic and let B and C be triggered separately. This does not solve cases like storing to a db and then send a db-updated event.
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