Create README.md

README.md

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+---
+language:
+- ms
+---
+
+# Mosaic format for filtered combine dataset to finetune TinyLlama models
+
+This repository is to store dataset shards using mosaic format.
+
+1. https://github.com/malaysia-ai/dedup-text-dataset/blob/main/tinyllama/combine-dataset.ipynb
+2. using tokenizer https://huggingface.co/TinyLlama/TinyLlama-1.1B-intermediate-step-955k-token-2T
+3. 4096 context length.
+
+## how-to
+
+1. git clone,
+
+```bash
+git lfs clone https://huggingface.co/datasets/malaysia-ai/mosaic-tinyllama
+```
+
+2. load it,
+
+```python
+from streaming import LocalDataset
+import numpy as np
+from streaming.base.format.mds.encodings import Encoding, _encodings
+
+class UInt16(Encoding):
+    def encode(self, obj) -> bytes:
+        return obj.tobytes()
+
+    def decode(self, data: bytes):
+        return np.frombuffer(data, np.uint16)
+
+_encodings['uint16'] = UInt16
+
+dataset = LocalDataset('mosaic-tinyllama')
+len(dataset)
+```