hadoop-yarn-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3949) ensure timely flush of timeline writes
Date Thu, 23 Jul 2015 18:42:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-3949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14639335#comment-14639335
] 

Sangjin Lee commented on YARN-3949:
-----------------------------------

[~vrushalic], is your concern whether a service can receive calls (write, ...) once it's in
the middle of stopping? If so, I'm not 100% certain that it is impossible, although it should
not happen in reality. Do we normally guard against service stopping as a rule? Others?

> ensure timely flush of timeline writes
> --------------------------------------
>
>                 Key: YARN-3949
>                 URL: https://issues.apache.org/jira/browse/YARN-3949
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
>         Attachments: YARN-3949-YARN-2928.001.patch
>
>
> Currently flushing of timeline writes is not really handled. For example, {{HBaseTimelineWriterImpl}}
relies on HBase's {{BufferedMutator}} to batch and write puts asynchronously. However, {{BufferedMutator}}
may not flush them to HBase unless the internal buffer fills up.
> We do need a flush functionality first to ensure that data are written in a reasonably
timely manner, and to be able to ensure some critical writes are done synchronously (e.g.
key lifecycle events).



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message