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Posted to common-user@hadoop.apache.org by Dhanasekaran Anbalagan <bu...@gmail.com> on 2013/02/14 10:12:36 UTC

How to understand DataNode usages ?

Hi Guys,

In Datanode UI page they give Datanode usage. what does actually mean,
Please guide me Min, Median, stdev


DataNodes usages:Min %Median %Max %stdev %
                             22.15 %24.33 %58.09 %15.4 %


-Dhanasekaran

Did I learn something today? If not, I wasted it.

Re: How to understand DataNode usages ?

Posted by Hemanth Yamijala <yh...@thoughtworks.com>.
This seems to be related to the % used capacity at a datanode. The values
are computed for all the live datanodes, and the range / central limits /
deviations are computed based on a sorted list of the values.

Thanks
hemanth


On Thu, Feb 14, 2013 at 2:42 PM, Dhanasekaran Anbalagan
<bu...@gmail.com>wrote:

> Hi Guys,
>
> In Datanode UI page they give Datanode usage. what does actually mean,
> Please guide me Min, Median, stdev
>
>
> DataNodes usages:Min %Median %Max %stdev %
>                              22.15 %24.33 %58.09 %15.4 %
>
>
> -Dhanasekaran
>
> Did I learn something today? If not, I wasted it.
>

Re: How to understand DataNode usages ?

Posted by Hemanth Yamijala <yh...@thoughtworks.com>.
This seems to be related to the % used capacity at a datanode. The values
are computed for all the live datanodes, and the range / central limits /
deviations are computed based on a sorted list of the values.

Thanks
hemanth


On Thu, Feb 14, 2013 at 2:42 PM, Dhanasekaran Anbalagan
<bu...@gmail.com>wrote:

> Hi Guys,
>
> In Datanode UI page they give Datanode usage. what does actually mean,
> Please guide me Min, Median, stdev
>
>
> DataNodes usages:Min %Median %Max %stdev %
>                              22.15 %24.33 %58.09 %15.4 %
>
>
> -Dhanasekaran
>
> Did I learn something today? If not, I wasted it.
>

Re: How to understand DataNode usages ?

Posted by Hemanth Yamijala <yh...@thoughtworks.com>.
This seems to be related to the % used capacity at a datanode. The values
are computed for all the live datanodes, and the range / central limits /
deviations are computed based on a sorted list of the values.

Thanks
hemanth


On Thu, Feb 14, 2013 at 2:42 PM, Dhanasekaran Anbalagan
<bu...@gmail.com>wrote:

> Hi Guys,
>
> In Datanode UI page they give Datanode usage. what does actually mean,
> Please guide me Min, Median, stdev
>
>
> DataNodes usages:Min %Median %Max %stdev %
>                              22.15 %24.33 %58.09 %15.4 %
>
>
> -Dhanasekaran
>
> Did I learn something today? If not, I wasted it.
>

Re: How to understand DataNode usages ?

Posted by Hemanth Yamijala <yh...@thoughtworks.com>.
This seems to be related to the % used capacity at a datanode. The values
are computed for all the live datanodes, and the range / central limits /
deviations are computed based on a sorted list of the values.

Thanks
hemanth


On Thu, Feb 14, 2013 at 2:42 PM, Dhanasekaran Anbalagan
<bu...@gmail.com>wrote:

> Hi Guys,
>
> In Datanode UI page they give Datanode usage. what does actually mean,
> Please guide me Min, Median, stdev
>
>
> DataNodes usages:Min %Median %Max %stdev %
>                              22.15 %24.33 %58.09 %15.4 %
>
>
> -Dhanasekaran
>
> Did I learn something today? If not, I wasted it.
>