diff --git a/alignn/config.py b/alignn/config.py
index c8a21279..d7c807ae 100644
--- a/alignn/config.py
+++ b/alignn/config.py
@@ -207,7 +207,8 @@ class TrainingConfig(BaseSettings):
     distributed: bool = False
     data_parallel: bool = False
     n_early_stopping: Optional[int] = None  # typically 50
-    output_dir: str = os.path.abspath(".")  # typically 50
+    output_dir: str = os.path.abspath(".")
+    use_lmdb: bool = True
     # alignn_layers: int = 4
     # gcn_layers: int =4
     # edge_input_features: int= 80
diff --git a/alignn/data.py b/alignn/data.py
index cb6ea654..a542a02f 100644
--- a/alignn/data.py
+++ b/alignn/data.py
@@ -139,7 +139,7 @@ def get_train_val_loaders(
     save_dataloader: bool = False,
     filename: str = "sample",
     id_tag: str = "jid",
-    use_canonize: bool = False,
+    use_canonize: bool = True,
     # use_ddp: bool = False,
     cutoff: float = 8.0,
     cutoff_extra: float = 3.0,
@@ -152,7 +152,7 @@ def get_train_val_loaders(
     output_dir=None,
     world_size=0,
     rank=0,
-    use_lmdb: bool = False,
+    use_lmdb: bool = True,
 ):
     """Help function to set up JARVIS train and val dataloaders."""
     if use_lmdb:
diff --git a/alignn/examples/sample_data_ff/config_example_atomwise.json b/alignn/examples/sample_data_ff/config_example_atomwise.json
index 7c761a4d..2b915ddb 100644
--- a/alignn/examples/sample_data_ff/config_example_atomwise.json
+++ b/alignn/examples/sample_data_ff/config_example_atomwise.json
@@ -31,12 +31,13 @@
     "progress": true,
     "log_tensorboard": false,
     "standard_scalar_and_pca": false,
-    "use_canonize": false,
+    "use_canonize": true,
     "num_workers": 0,
     "cutoff": 8.0,
     "max_neighbors": 12,
     "keep_data_order": true,
     "distributed":false,
+    "use_lmdb": true,
     "model": {
         "name": "alignn_atomwise",
         "atom_input_features": 92,
@@ -48,7 +49,10 @@
         "graphwise_weight":0.85,
         "gradwise_weight":0.05,
         "atomwise_weight":0.0,
-        "stresswise_weight":0.05
-          
+        "stresswise_weight":0.05,
+        "add_reverse_forces":true,
+        "lg_on_fly":true
+
+
     }
 }
diff --git a/alignn/train.py b/alignn/train.py
index 4c7d92ed..a4822f84 100644
--- a/alignn/train.py
+++ b/alignn/train.py
@@ -123,7 +123,8 @@ def train_dgl(
     # print("rank", rank)
     # setup(rank, world_size)
     if rank == 0:
-        print(config)
+        print("config:")
+        # print(config)
         if type(config) is dict:
             try:
                 print(config)
@@ -136,7 +137,6 @@ def train_dgl(
     # checkpoint_dir = os.path.join(config.output_dir)
     # deterministic = False
     classification = False
-    print("config:")
     tmp = config.dict()
     f = open(os.path.join(config.output_dir, "config.json"), "w")
     f.write(json.dumps(tmp, indent=4))
@@ -195,7 +195,7 @@ def train_dgl(
             standard_scalar_and_pca=config.standard_scalar_and_pca,
             keep_data_order=config.keep_data_order,
             output_dir=config.output_dir,
-            # use_ddp=use_ddp,
+            use_lmdb=config.use_lmdb,
         )
     else:
         train_loader = train_val_test_loaders[0]
@@ -876,6 +876,10 @@ def get_batch_errors(dat=[]):
                         targets.append(ii)
                         predictions.append(jj)
             f.close()
+        if config.use_lmdb:
+            train_loader.dataset.close()
+            val_loader.dataset.close()
+            test_loader.dataset.close()
 
 
 if __name__ == "__main__":
diff --git a/alignn/train_alignn.py b/alignn/train_alignn.py
index 76a25c56..5f2b5016 100644
--- a/alignn/train_alignn.py
+++ b/alignn/train_alignn.py
@@ -387,12 +387,13 @@ def train_for_folder(
         standard_scalar_and_pca=config.standard_scalar_and_pca,
         keep_data_order=config.keep_data_order,
         output_dir=config.output_dir,
+        use_lmdb=config.use_lmdb,
     )
     # print("dataset", dataset[0])
     t1 = time.time()
     # world_size = torch.cuda.device_count()
-    print("rank ht1", rank)
-    print("world_size ht1", world_size)
+    print("rank", rank)
+    print("world_size", world_size)
     train_dgl(
         config,
         model=model,