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https://issues.apache.org/jira/browse/HADOOP-18805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-18805.
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Fix Version/s: 3.3.9
Resolution: Fixed
> s3a large file prefetch tests are too slow, don't validate data
> ---------------------------------------------------------------
>
> Key: HADOOP-18805
> URL: https://issues.apache.org/jira/browse/HADOOP-18805
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3, test
> Affects Versions: 3.3.9
> Reporter: Steve Loughran
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.3.9
>
>
> the large file prefetch tests (including LRU cache eviction) are really slow.
> moving under -scale may hide the problem for most runs, but they are still
> too slow, can time out, etc etc.
> also, and this is very, very important, they can't validate the data.
> Better:
> * test on smaller files by setting a very small block size (1k bytes or less)
> just to force paged reads of a small 16k file.
> * with known contents to the values of all forms of read can be validated
> * maybe the LRU tests can work with a fake remote object which can then be
> used in a unit test
> * extend one of the huge file tests to read from there -including s3-CSE
> encryption coverage.
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