minio的多版本是怎么实现的

1、界面上传3次1M文件，可以显示3个版本的

2、在文件名1M目录下会有3个uuid为名的目录

3、其中的xl.meta文件可以使用xl-meta工具解析，这里会记录详细的版本信息

{
  "Versions": [
    {
      "Header": {
        "Flags": 2,
        "ModTime": "2024-03-01T11:03:36.547915333+08:00",
        "Signature": "ca212968",
        "Type": 1,
        "VersionID": "692366c021fa42719bcbe5e11a014dc7"
      },
      "Idx": 0,
      "Metadata": {
        "Type": 1,
        "V2Obj": {
          "CSumAlgo": 1,
          "DDir": "6UdcaondRk2c6/VRU7TcVw==",
          "EcAlgo": 1,
          "EcBSize": 1048576,
          "EcDist": [
            4,
            1,
            2,
            3
          ],
          "EcIndex": 4,
          "EcM": 2,
          "EcN": 2,
          "ID": "aSNmwCH6QnGby+XhGgFNxw==",
          "MTime": 1709262216547915333,
          "MetaSys": {},
          "MetaUsr": {
            "content-type": "application/octet-stream",
            "etag": "b6d81b360a5672d80c27430f39153e2c"
          },
          "PartASizes": [
            1048576
          ],
          "PartETags": null,
          "PartNums": [
            1
          ],
          "PartSizes": [
            1048576
          ],
          "Size": 1048576
        },
        "v": 0
      }
    },
    {
      "Header": {
        "Flags": 2,
        "ModTime": "2024-03-01T10:27:05.174696003+08:00",
        "Signature": "d2ee3cd0",
        "Type": 1,
        "VersionID": "d1e0ff5263a641749a2ca3d34caa13fa"
      },
      "Idx": 1,
      "Metadata": {
        "Type": 1,
        "V2Obj": {
          "CSumAlgo": 1,
          "DDir": "potrhWjRSFKRDbQJU/gVoQ==",
          "EcAlgo": 1,
          "EcBSize": 1048576,
          "EcDist": [
            4,
            1,
            2,
            3
          ],
          "EcIndex": 4,
          "EcM": 2,
          "EcN": 2,
          "ID": "0eD/UmOmQXSaLKPTTKoT+g==",
          "MTime": 1709260025174696003,
          "MetaSys": {},
          "MetaUsr": {
            "content-type": "application/octet-stream",
            "etag": "b6d81b360a5672d80c27430f39153e2c"
          },
          "PartASizes": [
            1048576
          ],
          "PartETags": null,
          "PartNums": [
            1
          ],
          "PartSizes": [
            1048576
          ],
          "Size": 1048576
        },
        "v": 0
      }
    },
    {
      "Header": {
        "Flags": 2,
        "ModTime": "2024-03-01T10:26:54.412385108+08:00",
        "Signature": "c51fac32",
        "Type": 1,
        "VersionID": "4cb4a2cd3cee4569bc7363e7bfc3ce50"
      },
      "Idx": 2,
      "Metadata": {
        "Type": 1,
        "V2Obj": {
          "CSumAlgo": 1,
          "DDir": "lqs4RiwkQBiG9w5PVk/5ow==",
          "EcAlgo": 1,
          "EcBSize": 1048576,
          "EcDist": [
            4,
            1,
            2,
            3
          ],
          "EcIndex": 4,
          "EcM": 2,
          "EcN": 2,
          "ID": "TLSizTzuRWm8c2Pnv8POUA==",
          "MTime": 1709260014412385108,
          "MetaSys": {},
          "MetaUsr": {
            "content-type": "application/octet-stream",
            "etag": "b6d81b360a5672d80c27430f39153e2c"
          },
          "PartASizes": [
            1048576
          ],
          "PartETags": null,
          "PartNums": [
            1
          ],
          "PartSizes": [
            1048576
          ],
          "Size": 1048576
        },
        "v": 0
      }
    }
  ]
}