Perf: remove redundant checks on data integrity (deepmodeling#4433)

Systems are aggregated here

https://github.com/deepmodeling/deepmd-kit/blob/f343a3b212edab5525502e0261f3068c0b6fb1f6/deepmd/utils/data_system.py#L802
and later initialized here

https://github.com/deepmodeling/deepmd-kit/blob/f343a3b212edab5525502e0261f3068c0b6fb1f6/deepmd/utils/data_system.py#L809-L810

This process will instantiate `DeepmdData` class, and it will perform
data integrity checks

https://github.com/deepmodeling/deepmd-kit/blob/e695a91ca6f7a1c9c830ab1c58b7b7a05db3da23/deepmd/utils/data.py#L80-L82

Besides, the checking process enumerates all items for all ranks, which
is unnecessary and quite slow. So this PR removes this check.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Enhanced flexibility in defining test sizes by allowing percentage
input for the `test_size` parameter.
- Introduced a new method to automatically compute test sizes based on
the specified percentage of total data.
- Improved path handling to accept both string and Path inputs,
enhancing usability.

- **Bug Fixes**
- Improved error handling for invalid paths, ensuring users receive
clear feedback when files are not found.

- **Deprecation Notice**
- The `get_test` method is now deprecated, with new logic implemented
for loading test data when necessary.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Signed-off-by: Chun Cai <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Jinzhe Zeng <[email protected]>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
(cherry picked from commit 3917cf0)

deepmd/utils/data.py

@@ -60,6 +60,8 @@ def __init__(
     ) -> None:
         """Constructor."""
         root = DPPath(sys_path)
+        if not root.is_dir():
+            raise FileNotFoundError(f"System {sys_path} is not found!")
         self.dirs = root.glob(set_prefix + ".*")
         if not len(self.dirs):
             raise FileNotFoundError(f"No {set_prefix}.* is found in {sys_path}")

deepmd/utils/data_system.py

@@ -28,9 +28,6 @@
 from deepmd.utils.out_stat import (
     compute_stats_from_redu,
 )
-from deepmd.utils.path import (
-    DPPath,
-)
 
 log = logging.getLogger(__name__)
 
@@ -103,6 +100,8 @@ def __init__(
         del rcut
         self.system_dirs = systems
         self.nsystems = len(self.system_dirs)
+        if self.nsystems <= 0:
+            raise ValueError("No systems provided")
         self.data_systems = []
         for ii in self.system_dirs:
             self.data_systems.append(
@@ -755,23 +754,6 @@ def process_systems(systems: Union[str, list[str]]) -> list[str]:
         systems = expand_sys_str(systems)
     elif isinstance(systems, list):
         systems = systems.copy()
-    help_msg = "Please check your setting for data systems"
-    # check length of systems
-    if len(systems) == 0:
-        msg = "cannot find valid a data system"
-        log.fatal(msg)
-        raise OSError(msg, help_msg)
-    # roughly check all items in systems are valid
-    for ii in systems:
-        ii = DPPath(ii)
-        if not ii.is_dir():
-            msg = f"dir {ii} is not a valid dir"
-            log.fatal(msg)
-            raise OSError(msg, help_msg)
-        if not (ii / "type.raw").is_file():
-            msg = f"dir {ii} is not a valid data system dir"
-            log.fatal(msg)
-            raise OSError(msg, help_msg)
     return systems
 
 

deepmd/utils/path.py

@@ -14,6 +14,7 @@
 from typing import (
     ClassVar,
     Optional,
+    Union,
 )
 
 import h5py
@@ -157,19 +158,16 @@ class DPOSPath(DPPath):
 
     Parameters
     ----------
-    path : str
+    path : Union[str, Path]
         path
     mode : str, optional
         mode, by default "r"
     """
 
-    def __init__(self, path: str, mode: str = "r") -> None:
+    def __init__(self, path: Union[str, Path], mode: str = "r") -> None:
         super().__init__()
         self.mode = mode
-        if isinstance(path, Path):
-            self.path = path
-        else:
-            self.path = Path(path)
+        self.path = Path(path)
 
     def load_numpy(self) -> np.ndarray:
         """Load NumPy array.
@@ -300,6 +298,8 @@ def __init__(self, path: str, mode: str = "r") -> None:
         # so we do not support file names containing #...
         s = path.split("#")
         self.root_path = s[0]
+        if not os.path.isfile(self.root_path):
+            raise FileNotFoundError(f"{self.root_path} not found")
         self.root = self._load_h5py(s[0], mode)
         # h5 path: default is the root path
         self._name = s[1] if len(s) > 1 else "/"