xuchuanyin created CARBONDATA-2204:
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Summary: Access tablestatus file too many times during query
Key: CARBONDATA-2204
URL: https://issues.apache.org/jira/browse/CARBONDATA-2204
Project: CarbonData
Issue Type: Improvement
Components: data-query
Affects Versions: 1.3.0
Reporter: xuchuanyin
Assignee: xuchuanyin
# Problems
Currently in carbondata, a single query will access tablestatus file 7 times,
which will definitely slow down the query performance especially when this file
is in remote cluster since reading this file is purely client side operation.
# Steps to reproduce
1. Add logger in `AtomicFileOperationsImpl.openForRead` and printout the file
name to read.
2. Run a query on carbondata table. Here I ran `TestLoadDataGeneral.test("test
data loading CSV file without extension name")`.
3. Observe the output log and search the keyword 'tablestatus'.
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