[docs](load) improve broker load structure (#1368)

docs/data-operate/import/import-way/broker-load-manual.md

@@ -60,6 +60,23 @@ WITH [HDFS|S3|BROKER broker_name]
 
 For the specific syntax for usage, please refer to [BROKER LOAD](../../../sql-manual/sql-statements/Data-Manipulation-Statements/Load/BROKER-LOAD) in the SQL manual.
 
+## Load Properties
+
+| Property Name | Type | Default Value | Description |
+| --- | --- | --- | --- |
+| "timeout" | Long | 14400 | Used to specify the timeout for the import in seconds. The configurable range is from 1 second to 259200 seconds. |
+| "max_filter_ratio" | Float | 0.0 | Used to specify the maximum tolerable ratio of filterable (irregular or otherwise problematic) data, which defaults to zero tolerance. The value range is 0 to 1. If the error rate of the imported data exceeds this value, the import will fail. Irregular data does not include rows filtered out by the where condition. |
+| "exec_mem_limit" | Long | 2147483648 | The memory limit in bytes of the load task, which defaults to 2GB. |
+| "strict_mode" | Boolean | false | Used to specify whether to enable strict mode for this import. |
+| "partial_columns" | Boolean | false | Used to specify whether to enable partial column update, the default value is false, this parameter is only available for Unique Key + Merge on Write tables. |
+| "timezone" | String | "Asia/Shanghai" | Used to specify the timezone to be used for this import. This parameter affects the results of all timezone-related functions involved in the import. |
+| "load_parallelism" | Integer | 8 | Limits the maximum parallel instances on each backend. |
+| "send_batch_parallelism" | Integer | 1 | The parallelism for sink node to send data, when memtable_on_sink_node is disabled. |
+| "load_to_single_tablet" | Boolean | "false" | Used to specify whether to load data only to a single tablet corresponding to the partition. This parameter is only available when loading to an OLAP table with random bucketing. |
+| "skip_lines" | Integer | "0" | It will skip some lines in the head of a csv file. It will be ignored when the format is csv_with_names or csv_with_names_and_types. |
+| "trim_double_quotes" | Boolean | "false" | Used to specify whether to trim the outermost double quotes of each field in the source files. |
+| "priority" | oneof "HIGH", "NORMAL", "LOW" | "NORMAL" | The priority of the task. |
+
 ## Checking import status
 
 Broker Load is an asynchronous import method, and the specific import results can be viewed through the [SHOW LOAD](../../../sql-manual/sql-statements/Show-Statements/SHOW-LOAD) command.
@@ -514,6 +531,7 @@ Doris supports importing data directly from object storage systems that support
     )
     WITH S3
     (
+        "provider" = "S3",
         "AWS_ENDPOINT" = "AWS_ENDPOINT",
         "AWS_ACCESS_KEY" = "AWS_ACCESS_KEY",
         "AWS_SECRET_KEY"="AWS_SECRET_KEY",
@@ -525,6 +543,17 @@ Doris supports importing data directly from object storage systems that support
     );
 ```
 
+The `provider` specifies the vendor of the S3 Service.
+Supported S3 Provider list:
+
+- "S3" (AWS, Amazon Web Services)
+- "AZURE" (Microsoft Azure)
+- "GCP" (GCP, Google Cloud Platform)
+- "OSS" (Alibaba Cloud)
+- "COS" (Tencent Cloud)
+- "OBS" (Huawei Cloud)
+- "BOS" (Baidu Cloud)
+
 ### Common Issues
 
 - The S3 SDK defaults to using the virtual-hosted style method for accessing objects. However, some object storage systems may not have enabled or supported the virtual-hosted style access. In such cases, we can add the `use_path_style` parameter to force the use of the path style method:
@@ -640,6 +669,8 @@ Different Broker types and access methods require different authentication infor
 
 ## Related Configurations
 
+### fe.conf
+
 The following configurations belong to the system-level settings for Broker load, which affect all Broker load import tasks. These configurations can be adjusted by modifying the `fe.conf `file.
 
 **min_bytes_per_broker_scanner**
@@ -669,6 +700,47 @@ Import Concurrency = Math.min(Source File Size / min_bytes_per_broker_scanner, m
 Processing Volume per BE for this Import = Source File Size / Import Concurrency
 ```
 
+**default_load_parallelism**
+
+- Default: 8.
+
+- Limits the maximum parallel instances on each backend.
+
+- The minimum processed data volume, maximum concurrency, size of the source file, and the current number of BE nodes jointly determine the concurrency of this import.
+
+```Plain
+Import Concurrency = Math.min(Source File Size / min_bytes_per_broker_scanner, max_broker_concurrency, Current Number of BE Nodes * load_parallelism)
+Processing Volume per BE for this Import = Source File Size / Import Concurrency
+```
+
+**broker_load_default_timeout_second**
+
+- Default: 14400.
+
+- The default broker load timeout in seconds.
+
+### session variables
+
+**exec_mem_limit**
+
+- Default: 2147483648.
+
+- The memory limit in bytes of the load.
+
+**time_zone**
+
+- Default: "Asia/Shanghai".
+
+- Default timezone, which affects time related functions in the load.
+
+**send_batch_parallelism**
+
+- Default: 1
+
+- The parallelism for sink node to send data, when memtable_on_sink_node is disabled.
+
+Set session variable `enable_memtable_on_sink_node` (defaults to true) to false to disable this feature.
+
 ## Common Issues
 
 **1. Import Error: `Scan bytes per broker scanner exceed limit:xxx`**