{
  "id": 207735,
  "title": "Findings of kaggle datasets",
  "url": "/competitions/riiid-test-answer-prediction/discussion/207735",
  "author_name": "Shihao Shao",
  "post_date": "2020-12-31T04:03:52.353000",
  "votes": 0,
  "comment_count": 0,
  "views": 0,
  "content": "<p>You can fallback your version of dataset to the previous one. However, the following situation will cause some problems(some of them are critical).</p>\n<p>1.The version you want to fallback to has more files than now.<br>\nIt will cause 'internal error' when you try to fallback your version. It is relatively harmless because at least you will know that some thing is wrong according to the error message.</p>\n<p>2.The version you want to fallback to has replaced some files.<br>\nThe process will run perfectly without any error. Nevertheless, the file content will not change! I did not know this and result in a sharply decrease of LB for about 0.30! I spent 2 days to debug and finally find the cause.</p>\n<p>Maybe you have already know it, but which just confuse me for long. Hope people will not fall into this mistake as I did before.</p>",
  "messages": [
    {
      "id": 1133257,
      "postDate": "2020-12-31T04:03:52.353Z",
      "content": "<p>You can fallback your version of dataset to the previous one. However, the following situation will cause some problems(some of them are critical).</p>\n<p>1.The version you want to fallback to has more files than now.<br>\nIt will cause 'internal error' when you try to fallback your version. It is relatively harmless because at least you will know that some thing is wrong according to the error message.</p>\n<p>2.The version you want to fallback to has replaced some files.<br>\nThe process will run perfectly without any error. Nevertheless, the file content will not change! I did not know this and result in a sharply decrease of LB for about 0.30! I spent 2 days to debug and finally find the cause.</p>\n<p>Maybe you have already know it, but which just confuse me for long. Hope people will not fall into this mistake as I did before.</p>",
      "rawMarkdown": "You can fallback your version of dataset to the previous one. However, the following situation will cause some problems(some of them are critical).\n\n1.The version you want to fallback to has more files than now.\nIt will cause 'internal error' when you try to fallback your version. It is relatively harmless because at least you will know that some thing is wrong according to the error message.\n\n2.The version you want to fallback to has replaced some files.\nThe process will run perfectly without any error. Nevertheless, the file content will not change! I did not know this and result in a sharply decrease of LB for about 0.30! I spent 2 days to debug and finally find the cause.\n\nMaybe you have already know it, but which just confuse me for long. Hope people will not fall into this mistake as I did before."
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "1133257": "You can fallback your version of dataset to the previous one. However, the following situation will cause some problems(some of them are critical).\n\n1.The version you want to fallback to has more files than now.\nIt will cause 'internal error' when you try to fallback your version. It is relatively harmless because at least you will know that some thing is wrong according to the error message.\n\n2.The version you want to fallback to has replaced some files.\nThe process will run perfectly without any error. Nevertheless, the file content will not change! I did not know this and result in a sharply decrease of LB for about 0.30! I spent 2 days to debug and finally find the cause.\n\nMaybe you have already know it, but which just confuse me for long. Hope people will not fall into this mistake as I did before."
  }
}