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https://issues.apache.org/jira/browse/HADOOP-15229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16724544#comment-16724544
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Steve Loughran commented on HADOOP-15229:
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Patch 012
* remove the ability to perform per-file encryption settings; it just causes
too much confusion.
* linereader v1 support
* new PassthroughCodec which, if declared in a job, disables gz codec. This
lets you query .csv.gz files (* docs, error message you get when you don't do
this, etc etc)
* output CSV can be configured through a matching set of options
* s3guard select CLI tests and enhanced operations, including -expected
option for testing
* many more tests on various bits of functionality and corner cases
* docs on using the API
* S3A statistics collects select count
Testing. S3 Ireland. All good apart from the known issues fixed by
Hadoop-14556: bouncy-castle not on the CP; session/role tests fail if, like me,
you keep your fs.s3a secrets in a jceks file.
> Add FileSystem builder-based openFile() API to match createFile()
> -----------------------------------------------------------------
>
> Key: HADOOP-15229
> URL: https://issues.apache.org/jira/browse/HADOOP-15229
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs, fs/azure, fs/s3
> Affects Versions: 3.0.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Attachments: HADOOP-15229-001.patch, HADOOP-15229-002.patch,
> HADOOP-15229-003.patch, HADOOP-15229-004.patch, HADOOP-15229-004.patch,
> HADOOP-15229-005.patch, HADOOP-15229-006.patch, HADOOP-15229-007.patch,
> HADOOP-15229-009.patch, HADOOP-15229-010.patch, HADOOP-15229-011.patch,
> HADOOP-15229-012.patch
>
>
> Replicate HDFS-1170 and HADOOP-14365 with an API to open files.
> A key requirement of this is not HDFS, it's to put in the fadvise policy for
> working with object stores, where getting the decision to do a full GET and
> TCP abort on seek vs smaller GETs is fundamentally different: the wrong
> option can cost you minutes. S3A and Azure both have adaptive policies now
> (first backward seek), but they still don't do it that well.
> Columnar formats (ORC, Parquet) should be able to say "fs.input.fadvise"
> "random" as an option when they open files; I can imagine other options too.
> The Builder model of [~eddyxu] is the one to mimic, method for method.
> Ideally with as much code reuse as possible
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