[data] DSSDisk: flush array to disk

data.py

@@ -249,5 +249,6 @@ class DSSDisk(DSS):
         if isinstance(value, np.ndarray) and not isinstance(value, np.memmap):
             with tempfile.NamedTemporaryFile() as tmp_file:
                 np.save(tmp_file, value)
+                tmp_file.flush()
                 value = np.load(tmp_file.name, mmap_mode="r+")
         return super().__setitem__(key, value)