Update README.md

README.md

@@ -23,44 +23,42 @@ libmoe/
 
 ---
 
-## 1) Prerequisites
 
-* Python + `huggingface_hub` CLI (or use `curl/wget`)
-* (Optional but faster) `hf_transfer` for high-speed downloads
+## 1) Download split parts from Hugging Face
 
-Install CLIs:
+Dataset: `DavidNguyen/ocr_vqa`, path: `ocr_vqa/images_part_*.zip.part`
 
-```bash
-pip install -U huggingface_hub hf_transfer
-# Login once (stores token):
-huggingface-cli login   # or set HF_TOKEN env var
-```
+###  Using `curl` directly (works anywhere)
 
----
+```bash
+#!/usr/bin/env bash
+set -euo pipefail
 
-## 2) Download split parts from Hugging Face
+DEST=./data/ocr_vqa/ocr_vqa_parts
+mkdir -p "$DEST"
+cd "$DEST"
 
-Dataset: `DavidNguyen/ocr_vqa`, path: `ocr_vqa/images_part_*.zip.part`
+# List of parts
+PARTS=$(echo a{a..x})        # aa ab ac ... ax
 
-###  Using `curl` directly (works anywhere)
+# Download function
+download_one() {
+  p="$1"
+  file="images_part_${p}.zip.part"
+  url="https://huggingface.co/datasets/DavidNguyen/ocr_vqa/resolve/main/ocr_vqa/${file}?download=true"
+  echo "[*] downloading $file"
+  curl -L --fail --retry 5 --retry-delay 3 -o "$file" "$url"
+}
 
-```bash
-DEST=/cm/archive/namnv78_A100_PDM/data
-mkdir -p "$DEST/ocr_vqa_parts"
-cd "$DEST/ocr_vqa_parts"
+export -f download_one
 
-for p in {aa..ax}; do
-  # Direct "resolve" URLs on HF (replace if repo path changes)
-  curl -L -o "images_part_${p}.zip.part" \
-    "https://huggingface.co/datasets/DavidNguyen/ocr_vqa/resolve/main/ocr_vqa/images_part_${p}.zip.part?download=true"
-done
+echo "$PARTS" | xargs -n1 -P8 bash -c 'download_one "$@"' _
 
-ls -lh
 ```
 
 ---
 
-## 3) (Optional) Quick integrity check on parts
+## 2) (Optional) Quick integrity check on parts
 
 ```bash
 # Show sizes to spot any truncated files
@@ -74,148 +72,22 @@ All parts should be ~2.1 GB except the last (`ax`) which may be smaller.
 
 ---
 
-## 4) Concatenate parts → a single ZIP
+## 3) Concatenate parts → a single ZIP
 
 If you already downloaded to `/cm/archive/namnv78_A100_PDM/data/`, the one-liner below (as requested) works:
 
 ```bash
-cat /cm/archive/namnv78_A100_PDM/data/images_part_*.zip.part \
-  > /cm/archive/namnv78_A100_PDM/data/images.zip
-```
-
-If you used the `ocr_vqa_parts` subfolder above:
-
-```bash
-cd /cm/archive/namnv78_A100_PDM/data/ocr_vqa_parts
-cat images_part_*.zip.part > ../images.zip
-```
-
-Verify the merged file:
-
-```bash
-cd /cm/archive/namnv78_A100_PDM/data
-ls -lh images.zip   # expect ~48–50 GB total
-# Optional checksum if provided:
-# md5sum images.zip
-```
-
----
-
-## 5) Unzip
-
-```bash
-cd /cm/archive/namnv78_A100_PDM/data
-mkdir -p ./images_unzip
-unzip -q images.zip -d ./images_unzip
-# Or faster with 7z:
-# 7z x images.zip -o./images_unzip
+mkdir /cm/archive/namnv78_A100_PDM/data/ocr_vqa
+cat /cm/archive/namnv78_A100_PDM/data/ocr_vqa/images_part_*.zip.part \
+  > /cm/archive/namnv78_A100_PDM/data/ocr_vqa/images.zip
 ```
 
-After extraction you should see the image files or an `images/` folder inside `images_unzip/` (depends on how the ZIP was packed).
-
 ---
 
-## 6) Place into the LibMoE data tree
-
-Target layout:
-
-```
-libmoe/data/ocr_vqa/images/
-```
-
-Create the tree (and optionally the other dataset folders to keep structure consistent):
-
-```bash
-# Adjust LIBMOE_ROOT to your actual path
-LIBMOE_ROOT=~/projects/libmoe
-
-mkdir -p "$LIBMOE_ROOT/data/image_onevision"
-mkdir -p "$LIBMOE_ROOT/data/coco/train2017"
-mkdir -p "$LIBMOE_ROOT/data/gqa/images"
-mkdir -p "$LIBMOE_ROOT/data/ocr_vqa/images"
-mkdir -p "$LIBMOE_ROOT/data/textvqa/train_images"
-mkdir -p "$LIBMOE_ROOT/data/vg/VG_100K"
-mkdir -p "$LIBMOE_ROOT/data/vg/VG_100K_2"
-```
-
-Now move (or symlink) the OCR-VQA images:
-
-```bash
-# Case A: the ZIP extracted directly to many image files:
-mv /cm/archive/namnv78_A100_PDM/data/images_unzip/* \
-   "$LIBMOE_ROOT/data/ocr_vqa/images/"
-
-# Case B: the ZIP contains an inner 'images/' folder:
-# mv /cm/archive/namnv78_A100_PDM/data/images_unzip/images/* \
-#    "$LIBMOE_ROOT/data/ocr_vqa/images/"
-```
-
-(If you prefer not to duplicate storage, create a symlink instead of `mv`):
+## 4) Unzip
 
 ```bash
-# Remove the target if it exists and point a symlink:
-rm -rf "$LIBMOE_ROOT/data/ocr_vqa/images"
-ln -s /cm/archive/namnv78_A100_PDM/data/images_unzip \
-      "$LIBMOE_ROOT/data/ocr_vqa/images"
-```
-
-Check:
-
-```bash
-tree -L 2 "$LIBMOE_ROOT/data" | sed -n '1,200p'
-```
-
-You should now see:
-
-```
-libmoe/
-└── data/
-    ├── image_onevision/
-    ├── coco/
-    │   └── train2017/
-    ├── gqa/
-    │   └── images/
-    ├── ocr_vqa/
-    │   └── images/   <-- OCR-VQA images here
-    ├── textvqa/
-    │   └── train_images/
-    └── vg/
-        ├── VG_100K/
-        └── VG_100K_2/
-```
-
----
-
-## 7) Troubleshooting
-
-* **`unzip: End-of-central-directory signature not found`**
-  One or more `.zip.part` files are missing/corrupted. Re-download the missing part(s) and re-run `cat`.
-
-* **Slow downloads / frequent timeouts**
-  Enable accelerated transfer: `export HF_HUB_ENABLE_HF_TRANSFER=1` (requires `hf_transfer` installed).
-  You can also run multiple parallel shells to fetch parts.
-
-* **Disk space**
-  You need free space for: all parts (~48–50 GB) **and** the unzipped images (size varies).
-  Delete parts after verifying extraction to reclaim space.
-
-* **Permission denied**
-  Use a writable directory or prefix commands with `sudo` if appropriate. Check that `$LIBMOE_ROOT` is correct.
+cd /cm/archive/namnv78_A100_PDM/data/ocr_vqa
+unzip -q images.zip 
 
----
-
-## 8) Clean up (optional)
-
-```bash
-rm -f /cm/archive/namnv78_A100_PDM/data/images.zip
-rm -rf /cm/archive/namnv78_A100_PDM/data/ocr_vqa_parts
 ```
-
----
-
-## 9) Notes
-
-* If new parts (e.g., `ay`, `az`, `ba`, …) are added later, append them to the `PARTS=(...)` list before running the loop.
-* For reproducibility, consider publishing an `md5sum` file for all parts and the final ZIP.
-
-Happy hacking!