diff --git a/src/zeroband/config.py b/src/zeroband/config.py
index aa230d63..905643c6 100644
--- a/src/zeroband/config.py
+++ b/src/zeroband/config.py
@@ -20,7 +20,7 @@ class DataConfig(BaseConfig):
     num_workers: int = 1
     max_train_samples: int | None = None
     max_eval_samples: int | None = None
-    dataset_ratio: str | None = None
+    dataset_ratio: str = "100"
     data_rank: int | None = None
     data_world_size: int | None = None
     reverse_data_files: bool = False
diff --git a/src/zeroband/train.py b/src/zeroband/train.py
index ea1837bc..fa42c3fd 100644
--- a/src/zeroband/train.py
+++ b/src/zeroband/train.py
@@ -632,6 +632,7 @@ def train(logger: Logger, config: Config, mpi_config: Optional[MPIConfig], devic
 
     num_inner_steps = config.diloco.inner_steps if config.diloco is not None else 1
 
+    logger.info(f"Attempting to connect PCCL to {config.pccl.ccoip_host}")
     # initialize PCCL
     communicator = Communicator(config.pccl.ccoip_host, mpi_config.mpi_rank if mpi_config is not None else 0)
     communicator.connect(n_attempts=15)