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Posted to jira@arrow.apache.org by "Micah Kornfield (Jira)" <ji...@apache.org> on 2022/02/09 06:53:00 UTC

[jira] [Comment Edited] (ARROW-12509) [C++] More fine-grained control of file creation in filesystem layer

    [ https://issues.apache.org/jira/browse/ARROW-12509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17489286#comment-17489286 ] 

Micah Kornfield edited comment on ARROW-12509 at 2/9/22, 6:52 AM:
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Note about the use-case on the blocking issue.  In the hadoop ecosystem GCS tries to emulate renames by doing a copy and delete.  The [copy|https://github.com/GoogleCloudDataproc/hadoop-connectors/pull/622/files#diff-122b4a11389e8967ef7004ddf049fd1e7d688cf1c52fc16e61b0af2e60ed120dL1164] use the if match feature) but I think this type of operation might be expensive.

 

 


was (Author: emkornfield):
Note about the use-case on the blocking issue.  In the hadoop ecosystem GCS tries to emulate renames by doing a copy and delete.  The (https://github.com/GoogleCloudDataproc/hadoop-connectors/pull/622/files[copy use the if match feature]) but I think this type of operation might be expensive.

 

 

> [C++] More fine-grained control of file creation in filesystem layer
> --------------------------------------------------------------------
>
>                 Key: ARROW-12509
>                 URL: https://issues.apache.org/jira/browse/ARROW-12509
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Antoine Pitrou
>            Assignee: Antoine Pitrou
>            Priority: Major
>
> {{FileSystem::OpenOutputStream}} silently truncates an existing file.
> It would be better to give more control to the user. Ideally, one could choose between several options: "always overwrite and fail if doesn't exist", "overwrite if exists, otherwise create", "creates if doesn't exist, otherwise fails".
> One should research whether e.g. S3 supports such control.



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