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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/09/29 02:35:00 UTC

[jira] [Updated] (FLINK-10461) Speed up download file procedure when restore

     [ https://issues.apache.org/jira/browse/FLINK-10461?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated FLINK-10461:
-----------------------------------
    Labels: pull-request-available  (was: )

> Speed up download file procedure when restore 
> ----------------------------------------------
>
>                 Key: FLINK-10461
>                 URL: https://issues.apache.org/jira/browse/FLINK-10461
>             Project: Flink
>          Issue Type: Improvement
>          Components: State Backends, Checkpointing
>            Reporter: Congxian Qiu
>            Assignee: Congxian Qiu
>            Priority: Major
>              Labels: pull-request-available
>
> In the current master branch, the restore will download file from DFS, the download procedure are single-thread, this could speed up by using multi-thread for downloading states from DFS.
>  
> In my company, the states will come to some terabytes, so the restore procedure will become a litter slow, after a bit digging, I find download states from DFS using single thread, this could using multi-thread for speed up.
> I test the time used for download states from DFS with ~2 terabytes states. With single thread it used 640+s, and 130+s when using 5 threads for download.



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