[jira] [Assigned] (HADOOP-18805) s3a large file prefetch tests are too slow, don't validate data

["Viraj Jasani (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-18805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Viraj Jasani reassigned HADOOP-18805:
-------------------------------------

    Assignee: Viraj Jasani

> 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
>            Assignee: Viraj Jasani
>            Priority: Major
>
> 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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