[I] [Doc] Lack of understanding "Namespace change events" for Zookeeper [pulsar]

["gulecroc (via GitHub)" <gi...@apache.org>]

gulecroc opened a new issue, #23748:
URL: https://github.com/apache/pulsar/issues/23748

   ### Search before asking
   
   - [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.
   
   
   ### What issue do you find in Pulsar docs?
   
   It is written that using namespace change event :
   
   > * Avoid using ZooKeeper and introduce more loads to ZooKeeper.
   
    https://pulsar.apache.org/docs/4.0.x/concepts-multi-tenancy/#namespace-change-events-and-topic-level-policies
   
   I don't understand the purpose of this : is it use more or less Zookeeper ?
   
   Best regards,
   Guillaume
   
   
   
   ### What is your suggestion?
   
   Correct description
   
   ### Any reference?
   
   _No response_
   
   ### Are you willing to submit a PR?
   
   - [ ] I'm willing to submit a PR!


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Re: [I] [Doc] Lack of understanding "Namespace change events" for Zookeeper [pulsar]

["merlimat (via GitHub)" <gi...@apache.org>]

merlimat commented on issue #23748:
URL: https://github.com/apache/pulsar/issues/23748#issuecomment-6377077965

   Thanks @gulecroc for the report. The Pulsar documentation now lives in apache/pulsar-site, and the page still has that sentence. It is meant to say that storing topic policies as events in the `__change_events` system topic avoids adding load on ZooKeeper (the metadata store). I'm moving this issue to apache/pulsar-site so the wording can be fixed.


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Re: [I] [Doc] Lack of understanding "Namespace change events" for Zookeeper [pulsar]

["lhotari (via GitHub)" <gi...@apache.org>]

lhotari commented on issue #23748:
URL: https://github.com/apache/pulsar/issues/23748#issuecomment-2550575332

   > I don't understand the purpose of this : is it use more or less Zookeeper ?
   
   I agree, it's hard to understand. There's a need to improve this description. My assumption is what it means is that namespace change events (and topic level policies) provide a way to reduce load on the metadata store backend (which is Zookeeper in most cases with Pulsar).


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