Update

Signed-off-by: acezen <[email protected]>

docs/storage_engine/graphar.md

@@ -68,7 +68,18 @@ GraphScope provides a set of APIs to load and archive graph data in GraphAr form
 
 ### Saving Graph Data in GraphAr
 
-You can save a graph in GraphAr format using the `save_to` function. Here's an example:
+You can save a graph in GraphAr format using the `save_to` function.
+
+`save_to` supports the following GraphAr related parameters:
+
+- **graphar_graph_name**: The name of the graph, default is "graph".
+- **graphar_file_type**: The file type of the graph data, including "csv", "orc", "parquet". default is "parquet".
+- **graphar_vertex_chunk_size**: The chunk size of the vertex data in graphar format, default is 2^18.
+- **graphar_edge_chunk_size**: The chunk size of the edge data in graphar format, default is 2^22.
+- **graphar_store_in_local**: Whether to make each worker store the part of the graph data in local file system, default is False.
+- **selector**: The selector to select the subgraph to save, if not specified, the whole graph will be saved.
+
+Here's an example:
 
 ```python
 import graphscope
@@ -85,6 +96,8 @@ r = g.save_to(
     format="graphar",
     graphar_graph_name="ldbc",  # the name of the graph
     graphar_file_type="parquet",  # the file type of the graph data
+    graphar_vertex_chunk_size=1024,  # the chunk size of the vertex data
+    graphar_edge_chunk_size=4096,  # the chunk size of the edge data
 )
 # the result is a dictionary that contains the format and the URI path of the saved graph
 print(r)
@@ -123,6 +136,8 @@ r = g.save_to(
     selector=selector,
     graphar_graph_name="ldbc_subgraph",  # the name of the graph
     graphar_file_type="parquet",  # the file type of the graph data
+    graphar_vertex_chunk_size=1024,  # the chunk size of the vertex data
+    graphar_edge_chunk_size=4096,  # the chunk size of the edge data
 )
 # the result is a dictionary that contains the format and the URI path of the saved graph
 print(r)
@@ -131,7 +146,13 @@ print(r)
 
 ### Loading GraphAr Data into GraphScope
 
-You can load a graph from GraphAr format data using the `load_from` function. Here's an example:
+You can load a graph from GraphAr format data using the `load_from` function.
+
+`load_from` supports the following GraphAr related parameters:
+- **graphar_store_in_local**: Whether the graph data is stored in the local file system of each worker, default is False.
+- **selector**: The selector to select the subgraph to load, if not specified, the whole graph will be loaded.
+
+Here's an example:
 
 
 ```python