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https://issues.apache.org/jira/browse/HBASE-2838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12892565#action_12892565
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HBase Review Board commented on HBASE-2838:
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Message from: "Jean-Daniel Cryans" <jdcry...@apache.org>
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This is an automatically generated e-mail. To reply, visit:
http://review.hbase.org/r/381/
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(Updated 2010-07-26 17:24:25.230486)
Review request for hbase.
Changes
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I split the replication metrics into two classes (one for source, one for
sink). ReplicationSourceMetrics will be instantiated as many times as there are
sources, and they are named with the source id. Took care of the other comments.
Summary
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Added the basic metrics, currently only accessible via hadoop metrics. Metrics
maintenance is done inline using ReplicationMetrics as a Singleton, wanted to
get others opinion on that.
If we are to cut a 0.89 soon, at least this patch needs to go in IMO.
This addresses bug HBASE-2838.
http://issues.apache.org/jira/browse/HBASE-2838
Diffs (updated)
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src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSink.java
3eec1d7
src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSinkMetrics.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSource.java
855cd6f
src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java
0501048
src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceMetrics.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationStatistics.java
PRE-CREATION
src/test/java/org/apache/hadoop/hbase/replication/TestReplication.java
28a6e51
Diff: http://review.hbase.org/r/381/diff
Testing
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Unit tests
Thanks,
Jean-Daniel
> Replication metrics
> -------------------
>
> Key: HBASE-2838
> URL: https://issues.apache.org/jira/browse/HBASE-2838
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jean-Daniel Cryans
> Assignee: Jean-Daniel Cryans
> Fix For: 0.90.0
>
>
> Replication needs to publish metrics about its performance:
> - WALEdits read, filtered, sent to slave clusters, applied on slaves
> - size of batches sent/received
> - ms spent on reading, sending, applying edits
> This can be done using HadoopMetrics.
> Also we need to publish information not related to performance:
> - size of each HLog queues
> - age of the last replicated edit in each queue
> - time of last successful replication
> These informations can hardly be graphed, but we still need to represent them
> somehow. It has to be accessible by web UI, shell, and other tools in
> general. I don't feel strongly about creating a new public method on HRS's
> interface, and I'm not sure publishing those in ZooKeeper is a good idea
> either (why add another indirection?). Still wondering about a better
> solution.
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