Tom Taylor

Chunkstore not leveraging indexes on read

1

#### Arctic Version ``` # 1.79.2 ``` #### Arctic Store ``` # ChunkStore ``` #### Platform and version Mongo DB 4.0.18 #### Description of problem and/or code sample that reproduces...

Chunkstore update with a Passthrough chunker duplicates segments when converting from Python 2.7->3

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#### Arctic Version ``` # All ``` #### Arctic Store ``` # ChunkStore ``` #### Platform and version 2.7 vs 3 #### Description of problem and/or code sample that reproduces...

reduce chunkstore memory footprint

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Two changes: 1. Reduce memory footprint when reading data 2. Handle duplicate columns in the filter. Using a 1GB dataframe: this PR:  master:  ``` import numpy as np...

Comparison of chunkstore and version store performance

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See attached. [results.xlsx](https://github.com/manahl/arctic/files/2153133/results.xlsx)