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update tsfile format changelist
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qiaojialin committed Mar 30, 2020
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# version-1 -> version-2

Last Updated on 2019-11-28 by Jialin Qiao.

| PR# | Name | Author | Changes |
| PR# | Name | Author | Changes |
| ---- | ------------------------------------------------------------ | --------------- | ------------------------------------------------------------ |
| 587 | [IOTDB-325] Refactor Statistics | qiaojialin | Move start time, end time, count in PageHeader and ChunkMetadata into Statistics; Remove maxTombstoneTime in ChunkHeader |

| 587 | [IOTDB-325] Refactor Statistics | qiaojialin | Move start time, end time, count in PageHeader and ChunkMetadata into Statistics; Remove maxTombstoneTime in ChunkHeader |
| 855 | New TsFile | HTHou | Remove ChunkGroupMetadata, store ChunkMetadata list by series, Add TimeseriesMetadata for each series |

# 0.8.0 (version-0) -> version-1

Last Updated on October 27th, 2019 by Lei Rui.
Last Updated on 2019-10-27 by Lei Rui.

| PR# | Name | Author | Changes |
| PR# | Name | Author | Changes |
| ---- | ------------------------------------------------------------ | --------------- | ------------------------------------------------------------ |
| 258 | [IOTDB-143]Development of merge | jt2594838 | Add totalChunkNum and invalidChunkNum to TsFileMetaData. |
| 409 | \[IOTDB-165\]\[TsFile\] Delete a current version and add a number version and an exception. | Genius_pig | (1) Delete a current version in TsFileMetaData; <br />(2) Change the TsFile magic number from 12 bytes to: 6 bytes magic string ("TsFile") + 6 bytes version number ({"000001", "000002", ""000003"}) ("v0.8.0" is the first version (we treat it as "000000"));<br />(3) The tail of a TsFile only has "TsFile" magic string, without the version number. |
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