GitHub user FANNG1 added a comment to the discussion: Iceberg Catalogs & S3 
access

> Let's say I have a dynamic catalog providers enabled. When I create multiple 
> catalogs with different backends (using the Gravitino Catalog API), dynamic 
> catalog providers feature will poll these catalogs and register them in 
> Iceberg REST server side so they will be accessible in downstream processes 
> through Iceberg REST?

YES,

> When I launch Gravitino server, what is the effect of having the previous 
> configuration?

This will create 3 catalogs:  the default catalog, `hive_backend` and  
`jdbc_backend ` catalog.

> Does this flag apply to all backends?

No, it's used to initiliaze the speicific catalog, like 
`gravitino.iceberg-rest.catalog.jdbc_backend.jdbc-inititialize = true` for 
`jdbc_backend` catalog or `gravitino.iceberg-rest.jdbc-inititialize = true` for 
the default catalog


GitHub link: 
https://github.com/apache/gravitino/discussions/9663#discussioncomment-15602816

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