feat(postgres): Change the postgres adapter to be partition aware #534
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Have the postgres adapter only fetch and do upkeep on activations that are part of the partition that the consumer is assigned. The broker can still update tasks outside its partitions, in case a worker is connected to a broker that is then rebalanced. Change the consumer to pass the partitions to the store whenever partitions are assigned. This was originally tested with PARTITION BY, but that requires manually keeping track of the partition tables which isn't a desired behaviour.
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Jan 19, 2026
| state = match (state, event) { | ||
| (ConsumerState::Ready, Event::Assign(tpl)) => { | ||
| metrics::gauge!("arroyo.consumer.current_partitions").set(tpl.len() as f64); | ||
| // Note: This assumes we only process one topic per consumer. |
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So far that has always been true.
| read_pool: PgPool, | ||
| write_pool: PgPool, | ||
| config: PostgresActivationStoreConfig, | ||
| partitions: RwLock<Vec<i32>>, |
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Should you use a tokio RwLock to avoid locking up one of the tokio threads?
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Have the postgres adapter only fetch and do upkeep on activations that are part of the partition that the consumer is assigned. The broker can still update tasks outside its partitions, in case a worker is connected to a broker that is then rebalanced. Change the consumer to pass the partitions to the store whenever partitions are assigned.