Add documentation for alter table configuration

# Conflicts:
#	website/docs/maintenance/operations/upgrade-notes-0.8.md

Author: loserwang1024

website/docs/engine-flink/ddl.md

@@ -220,6 +220,28 @@ DROP TABLE my_table;
 
 This will entirely remove all the data of the table in the Fluss cluster.
 
+## Alter Table
+### SET
+The SET statement allows you to configure one or more [Storage Options](engine-flink/options.md#storage-options) for a specified table. If a particular storage-option is already configured, it will be overridden with the new value.
+
+**Limits**
+1. `bootstrap.servers`,`bucket.num` and `bucket.key` cannot be altered.
+2. All the table options except `table.datalake.enabled` can be modified.
+3. If lakehouse is already enabled for a table, options with lakehouse format prefixes (e.g., `paimon.*`) cannot be set again.
+```sql title="Flink SQL"
+ALTER TABLE my_table SET ('table.datalake.enabled' = 'paimon');
+```
+
+
+### RESET 
+Reset one or more [Storage Options](engine-flink/options.md#storage-options) to its default value.
+
+The following examples illustrate the usage of the RESET statements.
+```sql title="Flink SQL"
+ALTER TABLE my_table RESET ('table.datalake.enabled');
+```
+
+
 ## Add Partition
 
 Fluss supports manually adding partitions to an existing partitioned table through the Fluss Catalog. If the specified partition 

website/docs/engine-flink/options.md

@@ -85,6 +85,12 @@ ALTER TABLE log_table SET ('table.log.ttl' = '7d');
 | table.merge-engine.versioned.ver-column | String   | (None)                              | The column name of the version column for the `versioned` merge engine. If the merge engine is set to `versioned`, the version column must be set.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
 | table.delete.behavior                   | Enum     | ALLOW                               | Controls the behavior of delete operations on primary key tables. Three modes are supported: `ALLOW` (default) - allows normal delete operations; `IGNORE` - silently ignores delete requests without errors; `DISABLE` - rejects delete requests and throws explicit errors. This configuration provides system-level guarantees for some downstream pipelines (e.g., Flink Delta Join) that must not receive any delete events in the changelog of the table. For tables with `first_row` or `versioned` merge engines, this option is automatically set to `IGNORE` and cannot be overridden. Only applicable to primary key tables.                                                                                                                                                                                                                                                                                                |
 
+Storage Options can be altered by [Alter Table](engine-flink/ddl.md#alter-table). The limitations are as follows:
+1. `bootstrap.servers`,`bucket.num` and `bucket.key` cannot be altered.
+2. All the table options except `table.datalake.enabled` can be modified.
+3. If lakehouse is already enabled for a table, options with lakehouse format prefixes (e.g., `paimon.*`) cannot be set again.
+
+
 ## Read Options
 
 | Option                                              | Type       | Default                                         | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |

website/docs/maintenance/operations/alter-config.md

@@ -0,0 +1,42 @@
+---
+title: Alter Configuration
+sidebar_position: 4
+---
+# Alter Configuration
+## Overview
+
+Fluss provides ways to alter the configuration of a cluster or a table. You can change and apply the configuration without restarting Fluss server. In this section, we will show how to alter the configuration of a cluster or a table.
+
+## Alter Cluster Configuration
+
+Currently, you can only alter the configuration of a cluster with  [Java client](engine-flink/apis/java-client.md).
+
+Currently, only `datalake.format` and options with prefix `datalake.${datalake.format}` can be altered. These options will also be served as table options when getting the table info.
+
+The AlterConfig class contains three key properties:
+* key: The configuration key to be modified (e.g., `datalake.format`)
+* value: The configuration value to be set (e.g., "paimon")
+* opType: The operation type, either AlterConfigOpType.SET or AlterConfigOpType.DELETE
+
+To disable a cluster, you can use the following code:
+```java
+admin.alterClusterConfigs(
+        Collections.singletonList(
+                new AlterConfig(DATALAKE_FORMAT.key(), "paimon", AlterConfigOpType.SET)));
+```
+
+To disable a cluster, you can use the following code:
+```java
+admin.alterClusterConfigs(
+        Collections.singletonList(
+                new AlterConfig(DATALAKE_FORMAT.key(), "paimon", AlterConfigOpType.DELETE)));
+```
+
+Currently, only `datalake.format` and option with prefix `datalake.${datalake.format}` can be altered. And this options will also be served as table options when getting the table info.
+
+## Alter Table Configuration
+
+Storage Options can be altered by [Alter Table](engine-flink/ddl.md#alter-table). The limitations are as follows:
+1. `bootstrap.servers`,`bucket.num` and `bucket.key` cannot be altered.
+2. All the table options except `table.datalake.enabled` can be modified.
+3. If lakehouse is already enabled for a table, options with lakehouse format prefixes (e.g., `paimon.*`) cannot be set again.

website/docs/maintenance/operations/graceful-shutdown.md

@@ -1,3 +1,8 @@
+---
+title: Graceful Shutdown
+sidebar_position: 3
+---
+
 # Graceful Shutdown
 
 Apache Fluss provides a **comprehensive graceful shutdown mechanism** to ensure data integrity and proper resource cleanup when stopping servers or services.