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Posted to issues@flink.apache.org by "Chesnay Schepler (JIRA)" <ji...@apache.org> on 2018/12/20 10:07:00 UTC
[jira] [Reopened] (FLINK-10461) Speed up RocksDB download file
procedure when restoring
[ https://issues.apache.org/jira/browse/FLINK-10461?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chesnay Schepler reopened FLINK-10461:
--------------------------------------
> Speed up RocksDB download file procedure when restoring
> -------------------------------------------------------
>
> Key: FLINK-10461
> URL: https://issues.apache.org/jira/browse/FLINK-10461
> Project: Flink
> Issue Type: New Feature
> Components: State Backends, Checkpointing
> Reporter: Congxian Qiu
> Assignee: Congxian Qiu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.8.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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