[jira] [Updated] (HADOOP-15229) Add FileSystem builder-based openFile() API to match createFile()

["Steve Loughran (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-15229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran updated HADOOP-15229:
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    Summary: Add FileSystem builder-based openFile() API to match createFile()  (was: Add FileSystem builder-based open API to match create())

> 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
>            Priority: Major
>
> 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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