[Refactor] add `--ceph` in args parse (#1793)

* update ceph in command

* update comments

* update

* fix lint

docs/en/notes/compatibility.md

@@ -7,8 +7,8 @@
 In this version, we make large refactoring based on MMEngine to achieve unified data elements, model interfaces, visualizers, evaluators and other runtime modules across different datasets, tasks and even codebases. A brief summary for this refactoring is as follows:
 
 - Data Element:
-  - We add [`Det3DDataSample`](https://github.com/open-mmlab/mmdetection3d/blob/dev-1.x/mmdet3d/structures/det3d_data_sample.py) as the common data element passing through datasets and models. It inherits from [`DetDataSample`]([https://github.com/open-mmlab/mmdetection3d/blob/dev-1.x/mmdet3d/structures/det3d_data_sample.py](https://github.com/open-mmlab/mmdetection/blob/dev-3.x/mmdet/structures/det_data_sample.py)) in mmdetection and implement ``InstanceData``, ``PixelData``, and
-``LabelData`` inheriting from ``BaseDataElement`` in MMEngine to represent different types of ground truth labels or predictions.
+  - We add [`Det3DDataSample`](https://github.com/open-mmlab/mmdetection3d/blob/dev-1.x/mmdet3d/structures/det3d_data_sample.py) as the common data element passing through datasets and models. It inherits from [`DetDataSample`](<%5Bhttps://github.com/open-mmlab/mmdetection3d/blob/dev-1.x/mmdet3d/structures/det3d_data_sample.py%5D(https://github.com/open-mmlab/mmdetection/blob/dev-3.x/mmdet/structures/det_data_sample.py)>) in mmdetection and implement `InstanceData`, `PixelData`, and
+    `LabelData` inheriting from `BaseDataElement` in MMEngine to represent different types of ground truth labels or predictions.
 - Datasets:
   - We add [`Det3DDataset`](https://github.com/open-mmlab/mmdetection3d/blob/dev-1.x/mmdet3d/datasets/det3d_dataset.py) and [`Seg3DDataset`](https://github.com/open-mmlab/mmdetection3d/blob/dev-1.x/mmdet3d/datasets/seg3d_dataset.py) as the base datasets to inherit from the unified `BaseDataset` in MMEngine. They implement most functions that are commonly used across different datasets and simplify the info loading/processing in the current datasets. Re-defined input arguments and functions can be most re-used in different datasets, which are important for the implementation of customized datasets.
   - We define the common keys across different datasets and unify all the info files with a standard protocol. The same info is more clear for users because they share the same key across different dataset infos. Besides, for different settings, such as camera-only and LiDAR-only methods, we no longer need different info formats (like the previous pkl and json files). We can just revise the `parse_data_info` to read the necessary information from a complete info file.

docs/en/notes/faq.md

@@ -8,7 +8,7 @@ We list some potential troubles encountered by users and developers, along with
 
   The required versions of MMEngine, MMCV and MMDetection for different versions of MMDetection3D are as below. Please install the correct version of MMEngine, MMCV and MMDetection to avoid installation issues.
 
-  | MMDetection3D version |     MMEngine version     |        MMCV version     |   MMDetection version    |
+  | MMDetection3D version |     MMEngine version     |      MMCV version       |   MMDetection version    |
   | :-------------------: | :----------------------: | :---------------------: | :----------------------: |
   |        dev-1.x        | mmengine>=0.1.0, \<0.2.0 | mmcv>=2.0.0rc0, \<2.1.0 | mmdet>=3.0.0rc0, \<3.1.0 |
   |       v1.1.0rc0       | mmengine>=0.1.0, \<0.2.0 | mmcv>=2.0.0rc0, \<2.1.0 | mmdet>=3.0.0rc0, \<3.1.0 |

tools/test.py

@@ -19,6 +19,8 @@ def parse_args():
     parser.add_argument(
         '--work-dir',
         help='the directory to save the file containing evaluation metrics')
+    parser.add_argument(
+        '--ceph', action='store_true', help='Use ceph as data storage backend')
     parser.add_argument(
         '--show', action='store_true', help='show prediction results')
     parser.add_argument(
@@ -80,7 +82,9 @@ def main():
     # load config
     cfg = Config.fromfile(args.config)
 
-    cfg = replace_ceph_backend(cfg)
+    # TODO: We will unify the ceph support approach with other OpenMMLab repos
+    if args.ceph:
+        cfg = replace_ceph_backend(cfg)
 
     cfg.launcher = args.launcher
     if args.cfg_options is not None:

tools/train.py

@@ -29,6 +29,8 @@ def parse_args():
         '--resume',
         action='store_true',
         help='resume from the latest checkpoint in the work_dir automatically')
+    parser.add_argument(
+        '--ceph', action='store_true', help='Use ceph as data storage backend')
     parser.add_argument(
         '--cfg-options',
         nargs='+',
@@ -60,7 +62,9 @@ def main():
     # load config
     cfg = Config.fromfile(args.config)
 
-    cfg = replace_ceph_backend(cfg)
+    # TODO: We will unify the ceph support approach with other OpenMMLab repos
+    if args.ceph:
+        cfg = replace_ceph_backend(cfg)
 
     cfg.launcher = args.launcher
     if args.cfg_options is not None: