GH-3156: Enable vectored IO by default. #3155
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What changes are included in this PR?
We currently had two variables to enable vectored-io,
HADOOP_VECTORED_IO_DEFAULT
andHADOOP_VECTORED_IO_ENABLED_DEFAULT
,#3128 updated
HADOOP_VECTORED_IO_DEFAULT
, which was not being used, so vectoredIO was still turned off by default.Are these changes tested?
Test with in proc Spark app, and ensured that vectored-io is used without the need to set
"parquet.hadoop.vectored.io.enabled", "true"
Are there any user-facing changes?