diff --git a/khaosz/data/__init__.py b/khaosz/data/__init__.py
index cdb4362..8882a1b 100644
--- a/khaosz/data/__init__.py
+++ b/khaosz/data/__init__.py
@@ -10,7 +10,7 @@ from khaosz.data.dataset import (
 )
 
 from khaosz.data.tokenizer import BpeTokenizer
-from khaosz.data.sampler import ResumeableRandomSampler
+from khaosz.data.sampler import ResumableDistributedSampler
 
 __all__ = [
     "BaseDataset",
@@ -22,5 +22,5 @@ __all__ = [
     "DatasetLoader",
     "load_pkl_files",
     "BpeTokenizer",
-    "ResumeableRandomSampler"
+    "ResumableDistributedSampler"
 ]
\ No newline at end of file
diff --git a/khaosz/data/sampler.py b/khaosz/data/sampler.py
index 0769f66..4a7ddbc 100644
--- a/khaosz/data/sampler.py
+++ b/khaosz/data/sampler.py
@@ -5,7 +5,7 @@ from torch.utils.data import Dataset, Sampler
 from typing import Optional
 
 
-class ResumeableRandomSampler(Sampler[int]):
+class ResumableDistributedSampler(Sampler[int]):
     def __init__(
         self, 
         data_source: Dataset,
@@ -13,6 +13,7 @@ class ResumeableRandomSampler(Sampler[int]):
         start_iter: int=0, 
         seed: int=42,
         drop_last: bool=False,
+        shuffle: bool=True,
         process_group: Optional[dist.ProcessGroup]=None,
     ):
         self.epoch = start_epoch
@@ -37,6 +38,8 @@ class ResumeableRandomSampler(Sampler[int]):
             self.num_replicas = 1
         
         self.drop_last = drop_last
+        self.shuffle = shuffle
+        
         offset = 0 if drop_last else  self.num_replicas - 1
         self.num_samples_per_replica = (self.num_samples + offset) // self.num_replicas
         self.total_size = self.num_samples_per_replica * self.num_replicas
@@ -44,9 +47,12 @@ class ResumeableRandomSampler(Sampler[int]):
         self._indices = None
     
     def _get_indices(self):
-        generator = torch.Generator()
-        generator.manual_seed(self.seed + self.epoch)
-        indices = torch.randperm(self.num_samples, generator=generator).tolist()
+        if self.shuffle:
+            generator = torch.Generator()
+            generator.manual_seed(self.seed + self.epoch)
+            indices = torch.randperm(self.num_samples, generator=generator).tolist()
+        else:
+            indices = torch.arange(self.num_samples).tolist()
         
         if not self.drop_last and self.num_samples < self.total_size:
             padding_size = self.total_size - len(indices)
diff --git a/khaosz/trainer/train_context.py b/khaosz/trainer/train_context.py
index f0009b7..77a8199 100644
--- a/khaosz/trainer/train_context.py
+++ b/khaosz/trainer/train_context.py
@@ -3,7 +3,7 @@ from typing import Optional, Self, TYPE_CHECKING
 from torch.optim import Optimizer
 from torch.utils.data import DataLoader
 from khaosz.config import Checkpoint
-from khaosz.data import ResumeableRandomSampler
+from khaosz.data import ResumableDistributedSampler
 from khaosz.trainer.schedule import BaseScheduler, SchedulerFactory
 
 if TYPE_CHECKING:
@@ -83,7 +83,7 @@ class TrainContextBuilder:
     def with_dataloader(self) -> Self:
         # fix: change batch level batch_iter to sample level offset
         sampler_offset = self._context.batch_iter * self.trainer.train_config.batch_size
-        resumeable_sampler = ResumeableRandomSampler(
+        resumeable_sampler = ResumableDistributedSampler(
             data_source=self.trainer.train_config.dataset,
             start_epoch=self._context.epoch,
             start_iter=sampler_offset,
diff --git a/tests/test_sampler.py b/tests/test_sampler.py
index c6ce6cf..3876ebd 100644
--- a/tests/test_sampler.py
+++ b/tests/test_sampler.py
@@ -6,8 +6,8 @@ def test_random_sampler_consistency(random_dataset):
     dataset = random_dataset
     
     # Create two samplers with same seed
-    sampler1 = ResumeableRandomSampler(dataset, seed=42)
-    sampler2 = ResumeableRandomSampler(dataset, seed=42)
+    sampler1 = ResumableDistributedSampler(dataset, seed=42)
+    sampler2 = ResumableDistributedSampler(dataset, seed=42)
     
     indices1 = list(iter(sampler1))
     indices2 = list(iter(sampler2))
@@ -19,8 +19,8 @@ def test_random_sampler_different_seeds(random_dataset):
     dataset = random_dataset
     
     # Create two samplers with different seeds
-    sampler1 = ResumeableRandomSampler(dataset, seed=42)
-    sampler2 = ResumeableRandomSampler(dataset, seed=123)
+    sampler1 = ResumableDistributedSampler(dataset, seed=42)
+    sampler2 = ResumableDistributedSampler(dataset, seed=123)
     
     indices1 = list(iter(sampler1))
     indices2 = list(iter(sampler2))
@@ -34,7 +34,7 @@ def test_sampler_across_epochs(random_dataset):
     dataset = random_dataset
     n = len(dataset)
     
-    sampler = ResumeableRandomSampler(dataset, seed=42)
+    sampler = ResumableDistributedSampler(dataset, seed=42)
     
     # Get indices for first epoch
     epoch1_indices = list(iter(sampler))