Update README.md

README.md

@@ -1,3 +1,79 @@
 ---
 license: apache-2.0
+task_categories:
+- text-generation
+language:
+- en
+tags:
+- data-juicer
+- pretraining
+size_categories:
+- 100M<n<1B
 ---
+
+# RedPajama -- C4 (refined by Data-Juicer)
+
+A refined version of C4 dataset in RedPajama by [Data-Juicer](https://github.com/alibaba/data-juicer). Removing some "bad" samples from the original dataset to make it higher-quality.
+
+This dataset is usually used to pretrain a Large Language Model.
+
+**Notice**: Here is a small subset for previewing. The whole dataset is available [here](https://dail-wlcb.oss-cn-wulanchabu.aliyuncs.com/LLM_data/our_refined_datasets/pretraining/redpajama-c4-refine-result.jsonl) (About 832GB).
+
+## Dataset Information
+
+- Number of samples: 344,491,171 (Keep ~94.42% from the original dataset)
+
+## Refining Recipe
+```yaml
+# global parameters
+project_name: 'Data-Juicer-recipes-c4'
+dataset_path: '/path/to/your/dataset'  # path to your dataset directory or file
+export_path: '/path/to/your/dataset.jsonl' # path to your dataset result file
+
+np: 50  # number of subprocess to process your dataset
+open_tracer: True
+
+# process schedule
+# a list of several process operators with their arguments
+process:
+  - clean_email_mapper:
+  - clean_links_mapper:
+  - fix_unicode_mapper:
+  - punctuation_normalization_mapper:
+  - whitespace_normalization_mapper:
+
+  - alphanumeric_filter:
+      tokenization: false
+      min_ratio: 0.65  # <3sigma (0.740)
+      max_ratio: 0.9   # >3sigma (0.867)
+  - average_line_length_filter:  # for code
+      max_len: 3000  # >3sigma (1277)
+  - character_repetition_filter:
+      rep_len: 10
+      max_ratio: 0.3  # >3sigma (0.168)
+  - language_id_score_filter:
+      min_score: 0.6
+  - maximum_line_length_filter:  # for code
+      max_len: 4000  # >3sigma (2017)
+  - perplexity_filter:
+      lang: en
+      max_ppl: 6000 #(>3sigma 4543)
+  - special_characters_filter:
+      max_ratio: 0.4  # > 3sigma (0.303)
+  - words_num_filter:
+      tokenization: true
+      min_num: 20
+      max_num: 10000
+  - word_repetition_filter:
+      lang: en
+      tokenization: true
+      rep_len: 10
+      max_ratio: 0.231  # 3sigma
+  - document_simhash_deduplicator:
+      tokenization: space
+      window_size: 6
+      lowercase: true
+      ignore_pattern: '\p{P}'
+      num_blocks: 6
+      hamming_distance: 4
+```