[jira] [Commented] (HIVE-26564) Separate query live operation log and historical operation log

["Stamatis Zampetakis (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-26564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17610439#comment-17610439 ] 

Stamatis Zampetakis commented on HIVE-26564:
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[~yigress] Can you please add some examples in the description with the sample structure of the log directories before and after the proposed changes. The current description is oriented towards developers  and people familiar with operation logging but JIRA tickets become also part of the release notes so it helps to provide some examples more tailored to end-users.

> Separate query live operation log and historical operation log
> --------------------------------------------------------------
>
>                 Key: HIVE-26564
>                 URL: https://issues.apache.org/jira/browse/HIVE-26564
>             Project: Hive
>          Issue Type: Improvement
>          Components: HiveServer2
>    Affects Versions: 4.0.0-alpha-2
>            Reporter: Yi Zhang
>            Assignee: Yi Zhang
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> HIVE-24802 added OperationLogManager to support historical operation logs. 
> OperationLogManager.createOperationLog creates operation log inside historical operation log dir if HIVE_SERVER2_HISTORIC_OPERATION_LOG_ENABLED=true. This is confusing, since on session level, SessionManager and HiveSession are using original operation log session directory.
> Proposed change is to separate live query's operation log and historical operation log. Upon operation close, OperationLogManager.closeOperation is called to move the operation log from session directory to historical log dir. OperationLogManager is only responsible to clean up historical operation logs.
> This change also makes it easier to manage historical logs, for example, user may want to persist historical logs, it is easier to differentiate live and historical operation logs.



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