Update README.md

README.md

@@ -1,4 +1,69 @@
-Merging and Extracting Split tar.xz Files
-Here's a step-by-step guide to merge your split dataset files and extract the contents:
-Step 1: Download All Parts
-First, make sure you have all the split parts downloaded to the same directory:
+# How to Merge and Extract Split tar.xz Files
+
+Follow these steps to combine and extract your split alibaba_dataset files.
+
+## Step 1: Download All Parts
+First, ensure all split parts are downloaded to the same directory:
+```
+alibaba_dataset_part_aa
+alibaba_dataset_part_ab
+alibaba_dataset_part_ac
+alibaba_dataset_part_ad
+alibaba_dataset_part_ae
+alibaba_dataset_part_af
+alibaba_dataset_part_ag
+```
+
+## Step 2: Merge the Split Files
+Use the `cat` command to concatenate all parts in the correct order:
+
+```bash
+cat alibaba_dataset_part_* > alibaba_dataset.tar.xz
+```
+
+This command combines all parts into a single file named `alibaba_dataset.tar.xz`.
+
+## Step 3: Verify the Merged File
+Check that the merged file was created successfully:
+
+```bash
+ls -lh alibaba_dataset.tar.xz
+```
+
+The file size should be approximately 500GB (the sum of all parts).
+
+## Step 4: Extract the tar.xz Archive
+Use the `tar` command with appropriate flags:
+
+```bash
+tar -xf alibaba_dataset.tar.xz
+```
+
+For progress visibility, add the verbose flag:
+
+```bash
+tar -xvf alibaba_dataset.tar.xz
+```
+
+## Step 5: Verify Extraction
+Once extraction is complete, check the extracted contents:
+
+```bash
+ls -la
+```
+
+## Memory-Efficient Options
+
+If disk space is limited, extract directly without saving the merged file:
+
+```bash
+cat alibaba_dataset_part_* | tar -xJ
+```
+
+For large archives that cause memory issues:
+
+```bash
+tar --use-compress-program="xz -d" -xf alibaba_dataset.tar.xz
+```
+
+This approach may handle very large archives more efficiently.