Optimize: Introduce multiple disk write for MPU

tosfs/stability.py

@@ -95,13 +95,15 @@ def retryable_func_executor(
                 raise e
 
             if is_retryable_exception(e):
-                logger.warn("Retry TOS request in the %d times, error: %s", attempt, e)
+                logger.warning("Retry TOS request in the %d times, error: %s", attempt, e)
                 try:
                     time.sleep(min(1.7**attempt * 0.1, 15))
                 except InterruptedError as ie:
                     raise TosfsError(f"Request {func} interrupted.") from ie
             else:
                 raise e
+        # Note: maybe not all the retryable exceptions are warped by `TosError`
+        # Will pay attention to those cases
         except Exception as e:
             raise TosfsError(f"{e}") from e