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From Eric Newton <>
Subject Re: OpenTSDB and Accumulo
Date Fri, 05 Oct 2012 01:47:04 GMT
I don't know, but it should be fairly easy; there's a REST API.  You can
always pull datapoints out of accumulo yourself.  I wish I was better at

Sometimes, when doing post-failure analysis, it would be *really* nice to

"Hey, was accumulo pushed into swap?"
"Did real memory get low?"
"Was java GC taking more and more time?"
"Huh... the New Generation was really getting huge."

So, that's my interest in it: gathering additional information, so after a
partial failure, we can determine what should be done to prevent problems
in the future.

At this point, it's good enough to use the built-in web server to explore
the datapoints during a failure event.

One thing that would be nice: analyse I/O performance over time to find
hardware that is having problems, but has not yet failed.


On Thu, Oct 4, 2012 at 12:44 PM, Ed Kohlwey <> wrote:

> Eric,
> This is a very cool project. I've heard of OpenTSDB before but hadn't ever
> had the chance to fiddle with it.
> Do you know what visualization and analytics packages are available on top
> of it?
> On Wed, Oct 3, 2012 at 5:29 PM, Eric Newton <> wrote:
>> A while back, I ported OpenTSDB to Accumulo.  I set it up on a real
>> (test) cluster, and let it collect some data points.
>> Eyecandy screenshot attached.  I was just playing around with it.  The
>> graph shows the culmulative load vs. the queued minor compactions.
>>  Probably not very useful, but it made a nice picture.
>> OpenTSDB:
>> OpenTSDB over Accumulo:
>> Accumulo can be monitored with the standard OpenTSDB, too. You need to
>> turn on the JMX metrics (conf/accumulo-metrics.xml).  I created a script to
>> collect tablet server metrics in my copy of tcollector (
>> <>
>> tcollector).
>> -Eric

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