hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3058) Hadoop DFS to report more replication metrics
Date Mon, 05 May 2008 19:21:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12594314#action_12594314
] 

Raghu Angadi commented on HADOOP-3058:
--------------------------------------


I would think the heartBeat variables will be updated thousands of times every second. I think
better approach would be to update the heavy weight metric variables only inside {{FSNamesystemMetrics.doUpdates()}}
that gets called every 5 seconds or so. This way these stats become pretty much free and also
sets good precedence for new metrics.

> Hadoop DFS to report more replication metrics
> ---------------------------------------------
>
>                 Key: HADOOP-3058
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3058
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: dfs, metrics
>            Reporter: Marco Nicosia
>            Assignee: lohit vijayarenu
>            Priority: Minor
>         Attachments: HADOOP-3058-2.patch, HADOOP-3058.patch
>
>
> Currently, the namenode and each datanode reports 'blocksreplicatedpersec.'
> We'd like to be able to graph pending replications, vs number of under replicated blocks,
vs. replications per second, so that we can get a better idea of the replication activity
within the DFS.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message