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https://issues.apache.org/jira/browse/HADOOP-15229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-15229:
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Status: Patch Available (was: Open)
Patch 005
h3. API
* mark new interfaces/classes/ops as unstable
h3. API tests
* FileContext tests in sync with filesystem
* openFile(PathHandle) adds test.
Filed HADOOP-15949: open(PathHandle) spec and implementations ambiguous about
what to raise when path is deleted.
h3. S3 select
working on the S3A select impl & tests
* all input options have .input. in their name, INPUT_ in the constant
* new landsat test of gzipped data through FS API working, with effort. Buggy
use of s3a: prefixes wasting time there
* better diags on failure, debug logging. You will need this.
* while doing this, factored out all logic to get landsat data & skip if its
not defined; now in S3ATestUtils.
Testing? New tests only
> 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
>
>
> 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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