hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Nicolas Spiegelberg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5886) Add new metric for possible data loss due to puts without WAL
Date Mon, 30 Apr 2012 17:55:49 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13265055#comment-13265055
] 

Nicolas Spiegelberg commented on HBASE-5886:
--------------------------------------------

I'm confused about why this metric is useful.  This metric is never accurate and determining
data loss because querying it is async from the Put path.  If you are looking for a restart
point, you should have another thread call HTable.flush() and checkpoint or add an API to
query for the latest timestamp in a CF's storefile. 
                
> Add new metric for possible data loss due to puts without WAL 
> --------------------------------------------------------------
>
>                 Key: HBASE-5886
>                 URL: https://issues.apache.org/jira/browse/HBASE-5886
>             Project: HBase
>          Issue Type: New Feature
>          Components: metrics, regionserver
>            Reporter: Matteo Bertozzi
>            Assignee: Matteo Bertozzi
>            Priority: Minor
>              Labels: metrics
>         Attachments: HBASE-5886-v0.patch, HBASE-5886-v1.patch, HBASE-5886-v2.patch
>
>
> Add a metrics to keep track of puts without WAL and possible data loss size.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message