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Posted to issues@ratis.apache.org by "Andy Wu (JIRA)" <ji...@apache.org> on 2019/02/01 19:15:00 UTC

[jira] [Commented] (RATIS-243) Add log purge function after taking snapshot

    [ https://issues.apache.org/jira/browse/RATIS-243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758587#comment-16758587 ] 

Andy Wu commented on RATIS-243:
-------------------------------

[~szetszwo] Sorry for the delay! I will create a pull request once it is ready. 

> Add log purge function after taking snapshot
> --------------------------------------------
>
>                 Key: RATIS-243
>                 URL: https://issues.apache.org/jira/browse/RATIS-243
>             Project: Ratis
>          Issue Type: Improvement
>          Components: server
>            Reporter: Andy Wu
>            Assignee: Andy Wu
>            Priority: Major
>
> After snapshotting the state machine, we can safely purge logs in the cache and disk.
> Based on the lastAppliedIndex, we can find out which segment the index lands, we can purge all previous segments if leader has no pending RPC on it. We will leave the segment where index lands alone, so we do not need to deal with partial file deletion logic. 
> Also if we only have snapshots, make sure we can install snapshots to the followers. 
>  



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