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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2019/10/08 14:35:02 UTC
[GitHub] [pulsar] Anonymitaet commented on a change in pull request #5293:
[ISSUE #4675][docs] Add *Delayed Message Delivery*
Anonymitaet commented on a change in pull request #5293: [ISSUE #4675][docs] Add *Delayed Message Delivery*
URL: https://github.com/apache/pulsar/pull/5293#discussion_r332543992
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File path: site2/docs/concepts-messaging.md
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@@ -411,4 +411,32 @@ Message deduplication makes Pulsar an ideal messaging system to be used in conju
> More in-depth information can be found in [this post](https://streaml.io/blog/pulsar-effectively-once/) on the [Streamlio blog](https://streaml.io/blog)
+## Delayed Message Delivery
+Delayed Message Delivery enables you to consume new message later, instead of immediately as normal. In this mechanism, messages is stored in memory after publish to broker, after specific delayed time passed, the message will be delivered to consumer.
+The diagram below illustrates concept:
+
+
+
+broker save message without any check. when consumer consume message, if message is delayed type, message will add to DelayedDeliveryTracker. subscription will check and get timeout messages from DelayedDeliveryTracker.
+
+### broker
Review comment:
```suggestion
### Broker
```
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