hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1956) Export HDFS read and write latency as a metric
Date Sat, 07 Nov 2009 02:33:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12774539#action_12774539
] 

Eli Collins commented on HBASE-1956:
------------------------------------

I double checked and there's already a dfs metric (writeBlockOp_avg_time) that you could use
to monitor write latency.

> Export HDFS read and write latency as a metric
> ----------------------------------------------
>
>                 Key: HBASE-1956
>                 URL: https://issues.apache.org/jira/browse/HBASE-1956
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Priority: Minor
>             Fix For: 0.20.3
>
>
> HDFS write latency spikes especially are an indicator of general cluster overloading.
We see this where the WAL writer complains about writes taking > 1 second, sometimes >
4, etc.  If for example the average write latency over the monitoring period is exported as
a metric, then this can feed into alerting for or automatic provisioning of additional cluster
hardware. While we're at it, export read side metrics as well.

-- 
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