[GitHub] [pulsar] Anonymitaet commented on a change in pull request #4845: [Doc] Add *Manage Schema* Section

[GitBox <gi...@apache.org>]

Anonymitaet commented on a change in pull request #4845: [Doc] Add *Manage Schema* Section
URL: https://github.com/apache/pulsar/pull/4845#discussion_r308776184
 
 

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 File path: site2/docs/schema-manage.md
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 @@ -0,0 +1,499 @@
+---
+id: schema-manage
+title: Manage schema
+sidebar_label: Manage schema
+---
+
+## Schema AutoUpdate
+
+If a schema passes the schema compatibility check, Pulsar producer automatically updates this schema to the topic it produces by default. 
+
+### AutoUpdate for producer
+
+For a producer, the `AutoUpdate` happens in the following cases:
+
+* If a **topic doesn’t have a schema**, Pulsar registers a schema automatically.
+
+* If a **topic has a schema**:
+
+  * If a **producer doesn’t carry a schema**:
+
+    * If `isSchemaValidationEnforced` or `schemaValidationEnforced` is **disabled** in the namespace to which the topic belongs, the producer is allowed to connect to the topic and produce data. 
+    
+    * If `isSchemaValidationEnforced` or `schemaValidationEnforced` is **enabled** in the namespace to which the topic belongs, the producer is rejected and disconnected.
+
+  * If a **producer carries a schema**:
+  
+    A broker performs the compatibility check based on the configured compatibility check strategy of the namespace to which the topic belongs. 
+    
+    * If it is a new schema and it passes the compatibility check, the broker registers a new schema automatically for the topic.
+
+    * If the schema does not pass the compatibility check, the broker does not register a schema.
+
+![AutoUpdate Producer](assets/schema-autoupdate-producer.png)
+
 
 Review comment:
   @sijie Is this diagram accurate?
   If so, I'll add one for `AutoUpdate for consumer`.

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