Github user interma commented on the issue:
https://github.com/apache/incubator-hawq/pull/1376
@superbobry Thanks for your PR and sorry for response late.
* hdfsPread, LGTM, thanks for your tests.
* hdfsSync, LGTM
Looks you just added a new `hdfsHSync()` function and didn't change
original `hdfsSync()` behavior, so it works with HAWQ.
* hdfsFlush
Do you mean you want to modify the `hdfsFlush()` behavior? I greped code,
HAWQ just uses `hdfsHFlush()` by now. So you can feel free to modify
`hdfsFlush()`, but make sure pass all tests (run all tests is a hard thing for
new committer, if your modification is simple, I can run this test for you).
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