THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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(I) Experiment of the necessity of TimeseriesMetadata
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- Although the index area structure with no TimeseriesMetadata speeds up a little in raw data query,
it reduces the speed a lot in aggregation query. => We should reserve TimeseriesMetadata. - The time cost does not change in the data area of TsFile.
(II) Experiment about combine Chunk and Page
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- one level index in one TsFile.
- Suitable for small Chunk (Mass Timeseries) scenario, in which 1 chunk has only 1~2 pages
(Note: Since 0.12, If one Chunk has only one Page, then PageStatistics will be removed, we only store statistics in ChunkMetadata)
(III) Experiment about how to store PageHeader
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(b) combine PageHeader with ChunkHeader
当前的读取方式为:将 Chunk 全都读取到内存后读取。
如果按照这样的方式,则 (a) (b) 两者所用的时间相同。
如果按照精细方式进行逐块读取,分析如下:
For raw data query in a Chunk:
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