[jira] [Updated] (BEAM-12818) When writing to GCS, spread prefix of temporary files and reuse autoscaling of the temporary directory

["Sam Whittle (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-12818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sam Whittle updated BEAM-12818:
-------------------------------
    Resolution: Fixed
        Status: Resolved  (was: Open)

> When writing to GCS, spread prefix of temporary files and reuse autoscaling of the temporary directory
> ------------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-12818
>                 URL: https://issues.apache.org/jira/browse/BEAM-12818
>             Project: Beam
>          Issue Type: Bug
>          Components: io-java-gcp
>            Reporter: Sam Whittle
>            Assignee: Sam Whittle
>            Priority: P1
>             Fix For: 2.35.0
>
>          Time Spent: 5h 40m
>  Remaining Estimate: 0h
>
> When writing files using FileIO, the given temporary directory has a subdirectory created in it for each FileBasedSink.  This is useful for non-windowed output where the temporary directory can be matched to delete leftover files that were lost during processing.
> However for windowed writes such subdirectories are unnecessary and cause a common prefix to be shared for the temporary files. Additionally this common prefix varies per job and thus the autoscaling for the previous prefix is no longer effective, see
> https://cloud.google.com/storage/docs/request-rate#randomness_after_sequential_prefixes_is_not_as_effective



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