[jira] [Closed] (FLINK-25403) Make BlobServer/BlobCache compatible with local working directories

["Till Rohrmann (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-25403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till Rohrmann closed FLINK-25403.
---------------------------------
    Resolution: Fixed

> Make BlobServer/BlobCache compatible with local working directories
> -------------------------------------------------------------------
>
>                 Key: FLINK-25403
>                 URL: https://issues.apache.org/jira/browse/FLINK-25403
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Coordination
>    Affects Versions: 1.15.0
>            Reporter: Till Rohrmann
>            Assignee: Till Rohrmann
>            Priority: Major
>             Fix For: 1.15.0
>
>
> With [FLIP-198|https://cwiki.apache.org/confluence/x/ZZiqCw] Flink processes can now have a working directory that they use to store "semi-persistent" information. The stored blobs by the {{BlobServer}} and the {{BlobCache}} can be candidates for such a storage because in case of a recovery we might not have to re-download them.
> In order to make the {{BlobServer}} and {{BlobCache}} work together with the local working directories, they have be able to detect corrupted blobs (e.g. due to process crashes when downloading blobs) and delete them. Therefore, I propose to let the {{BlobServer}} and {{BlobCache}} remember which blobs they have verified (by recomputing their checksums) and to delete those that did not pass.



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