Steve Loughran created HADOOP-15575:
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Summary: 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
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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