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Posted to common-issues@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2021/02/02 10:32:00 UTC
[jira] [Assigned] (HADOOP-17498) Add a MkdirOperation for chained
S3 operations during mkdir
[ https://issues.apache.org/jira/browse/HADOOP-17498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Loughran reassigned HADOOP-17498:
---------------------------------------
Assignee: Steve Loughran
> Add a MkdirOperation for chained S3 operations during mkdir
> -----------------------------------------------------------
>
> Key: HADOOP-17498
> URL: https://issues.apache.org/jira/browse/HADOOP-17498
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.1
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
>
> on S3A mkdirs is implemented as a walk up the tree looking for any parent dir, exiting fast when found; failing if a file is found.
> Proposed: pull this out into its own MkDir operation with the goals of efficiency, track duration and isolate/test
> * specific callbacks to getFileStatus and createFakeDirectory(key);
> * Move from simple getFileStatus call to probes assuming dir exists before looking for a file: HEAD + path /, LIST path,
> * the probe for a file HEAD path will only succeed in a failure mode where higher cost is a detail
> I think I'd also like to start looking at what we can do with some context tracking/telemetry where something provides an operation ID and ability to attach this to the requests
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