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https://issues.apache.org/jira/browse/HDDS-4155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17190662#comment-17190662
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Marton Elek commented on HDDS-4155:
-----------------------------------
Yesterday I learned that s3a supports this: it can display file name and
directory with the same name.
I am wondering what is the problem with it. It seems that Hadoop Compatible
File System can handle this and display both.
It seems to be very strange for me as this is something which should be avoid
with posix fs, but if hadoop can support it...
> Directory and filename can end up with same name in a path
> ----------------------------------------------------------
>
> Key: HDDS-4155
> URL: https://issues.apache.org/jira/browse/HDDS-4155
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Reporter: Bharat Viswanadham
> Assignee: Bharat Viswanadham
> Priority: Major
> Labels: pull-request-available
>
> Scenario:
> Create Key via S3, and Create Directory through Fs.
> # open key -> /a/b/c
> # CreateDirectory -> /a/b/c
> # CommitKey -> /a/b/c
> So, now in Ozone we will have directory and file with name "c"
> When created through Fs interface.
> # create file -> /a/b/c
> # CreateDirectory -> /a/b/c
> # CommitKey -> /a/b/c
> So, now in Ozone we will have directory and file with name "c"
>
> # InitiateMPU /a/b/c
> # Create Part1 /a/b/c
> # Commit Part1 /a/b/c
> # Create Directory /a/b/c
> # Complete MPU /a/b/c
> So, now in Ozone, we will have directory and file with name "c". In MPU this
> is one example scenario.
>
> Few proposals/ideas to solve this:
> # Check during commit whether a directory already exists with same name. But
> disadvantage is after user uploads the entire data during last stage we fail.
> (File system with create in progress acts similarly. Scenario: 1. vi t1 2.
> mkdir t1 3. Save t1: (Fail:"t1" is a directory)
> # During create directory check are there any open key creation with same
> name and fail.
>
> Any of the above approaches are not final, this Jira is opened to discuss
> this issue and come up with solution.
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