[Feature][C++] Support mmap as an optional local file read backend - #920
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Young-Leo wants to merge 1 commit into
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[Feature][C++] Support mmap as an optional local file read backend#920Young-Leo wants to merge 1 commit into
Young-Leo wants to merge 1 commit into
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Add AUTO, MMAP, and PREAD configuration across the C++, C, and Python APIs. Implement Windows and POSIX mappings with fallback and explicit errors, plus lifecycle tests, documentation, and comparison benchmarks for issue apache#903.
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Summary
AUTO,MMAP, andPREADlocal file read backends for the C++ reader.mmapand Windows file mapping, including automatic fallback and explicit mapping errors.Benchmark
Preliminary Windows Release benchmark using a 96.40 MiB TsFile with a warm OS page cache:
queryByRowThe results show that MMAP mainly benefits fine-grained random reads. It is not faster for every workload.
Closes #903