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# 0.10.x/0.11.x (version-2) -> 0.12.x (version-3)
| PR#   | Name                                                        | Author          | Changes                                                      |
| ----- | ----------------------------------------------------------- | --------------- | ------------------------------------------------------------ |
| 2263  | Move memtable plan index from ChunkGroupFooter to a separate marker      | jt2594838       | Add min/max plan index after MetaMarker.OPERATION_INDEX_RANGE when a memtable is flush|
| 2184  | [IOTDB-1081] New TsFile Format      | JackieTien97      | Please see [details](https://cwiki.apache.org/confluence/display/IOTDB/New+TsFile+Format)|
| 2445  | Remove versionInfo in Tsfile and get rid of versions in memtable      | wshao08       | Delete version info in TsFile |


# 0.9.x (version-1) -> 0.10.x (version-2)

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

| PR#   | Name                                                        | Author          | Changes                                                      |
| ---- | ------------------------------------------------------------ | --------------- | ------------------------------------------------------------ |
| 553  | [IOTDB-279] Merge TsDigest into Statistics                   | jack870131      | Merge the function of TsDigest into Statistics class, which TsDisgest is the ByteBuffer format of Statistics |
| 587  | [IOTDB-325] Refactor Statistics                              | qiaojialin      | Move start time, end time, count in PageHeader and ChunkMetadata into Statistics; Remove maxTombstoneTime in ChunkHeader |
| 855  | [IOTDB-587] New TsFile version 2                             | HTHou           | Remove ChunkGroupMetadata, store ChunkMetadata list by series, Add TimeseriesMetadata for each series |
| 1024 | [IOTDB-585] Fix recover version bug                          | qiaojialin      | Add MetaMarker.VERSION and version behind each flushing memtable (flushAllChunkGroups) |
| 1047 | [IOTDB-593] Add metaOffset in TsFileMetadata                 | qiaojialin      | Add metaOffset in TsFileMetadata |
| 1100 | [IOTDB-605] Add more levels of index in TsFileMetadata       | sunzesong       | Update the structure of deviceMetadata to a tree-level indexed TsFileMetadata |

# 0.8.0 -> 0.9.x (version-1)

Last Updated on 2019-10-27 by Lei Rui.

| 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. |
| 466  | [IOTDB-208] Bloom filter                                     | SilverNarcissus | Add four fields for the bloom filter to TsFileMetaData: 1) bit vector byte array length, 2) bit vector byte array, 3) the number of bits, 4) the number of hash functions. |





