[jira] [Updated] (HADOOP-15575) Add a way for an FS instance to say "really, no trash interval at all"

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

     [ https://issues.apache.org/jira/browse/HADOOP-15575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran updated HADOOP-15575:
------------------------------------
    Parent: HADOOP-18067  (was: HADOOP-17566)

> Add a way for an FS instance to say "really, no trash interval at all"
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-15575
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15575
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs, fs/s3
>    Affects Versions: 3.1.0
>            Reporter: Steve Loughran
>            Priority: Major
>
> Object stores like S3 often offer [object versioning|https://docs.aws.amazon.com/AmazonS3/latest/dev/ObjectVersioning.html] as a way to recover from accidental deletions. There is no need to use the Fs Shell trash mechanism.
> Proposed: a way for an FS instance to tell the shell to not use trash, even if the client has configured it. The current {{getServerDefaults().getTrashInterval()}} returns a value from the server, but it *only* overrides the ""fs.trash.interval" if it !=0. So if a server says "don't use trash" it gets ignored.
> If a special value (-1) is returned (or we use a new field?), FS instances can return to the shell saying "no need for trash". Then you can turn it on for a bucket by bucket basis; any store with the feature enabled can do the same thing.
> Alternative option: A special S3A-aware trash policy which does a getFileSystem.getConf.getBoolean("fs.s3a.trash.skip") & skips trash if set. This will all you to disable it on a bucket-by-bucket basis. 



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