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

Last Updated on October 27th, 2019 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. |





