Create README.md

README.md

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+---
+pretty_name: Slim pajama  627B binidx
+---
+This dataset comprises nine chunks (out of ten) from the Cerebras/SlimPajama-627B dataset, processed into a binary index (bin idx) format. 
+The first chunk is located at : ```rwkv-x-dev/slimpajama-binidx```.
+
+Due to their large size, each chunk is split into multiple parts for easier handling. To reassemble and decompress these parts, follow these steps:
+
+1. Combine all parts of the desired chunk into a single file:
+```cat chunk2_text_document_part_* > chunk2_text_document.tar.xz```
+
+2. Decompress the combined file:
+```xz -d chunk2_text_document.tar.xz```
+
+3. Extract the decompressed file:
+```tar -xvf chunk2_text_document.tar```
+
+This process successfully reassembles and decompresses the chosen chunk.
+```
+cat chunk2_text_document_part_* > chunk2_text_document.tar.xz
+xz -d chunk2_text_document.tar.xz
+tar -xvf chunk2_text_document.tar
+```