ganglia metrics for 'requests'

[Ryan Rawson <ry...@gmail.com>]

Hi all,

So I eventually figured out that HBase is reporting the 'request' metric in
X second increments - 10 in my case from the config file.  Unfortunately
that doesn't really seem to be an ideal solution...

So I messed about, and I tried to replicate what was done in Hadoop
Datanode, but all I ended up with was a counter of how many requests - not a
rate.

So I can't figure this out - how do we get a request rate in ganglia?  Is
there a magic flag that needs to be set somewhere so ganglia can transform a
counter into a rate?

Or do we just need to do more work dividing our requests by how many seconds
between reporting intervals?

helpppp!
-ryan

Re: ganglia metrics for 'requests'

[stack <st...@duboce.net>]

Sounds broken.   There are different types in 0.20.0 after a quick glance.
Maybe this is fixed there?
St.Ack

On Wed, Mar 11, 2009 at 9:46 AM, Ryan Rawson <ry...@gmail.com> wrote:

> I triesd time varying int and I just ended up with a monotonically
> increasing request counter...
>
> Mysterious!
>
> On Mar 11, 2009 9:28 AM, "stack" <st...@duboce.net> wrote:
>
> There are different counter types up in the hadoop metrics package.  Maybe
> we're using the wrong one (and they seem to have changed in hadoop 0.20.0).
> St.Ack
>
> On Wed, Mar 11, 2009 at 12:04 AM, Ryan Rawson <ry...@gmail.com> wrote:
> >
> Hi all, > > So I event...
>

Re: ganglia metrics for 'requests'

[Ryan Rawson <ry...@gmail.com>]

I triesd time varying int and I just ended up with a monotonically
increasing request counter...

Mysterious!

On Mar 11, 2009 9:28 AM, "stack" <st...@duboce.net> wrote:

There are different counter types up in the hadoop metrics package.  Maybe
we're using the wrong one (and they seem to have changed in hadoop 0.20.0).
St.Ack

On Wed, Mar 11, 2009 at 12:04 AM, Ryan Rawson <ry...@gmail.com> wrote: >
Hi all, > > So I event...

Re: ganglia metrics for 'requests'

[stack <st...@duboce.net>]

There are different counter types up in the hadoop metrics package.  Maybe
we're using the wrong one (and they seem to have changed in hadoop 0.20.0).
St.Ack

On Wed, Mar 11, 2009 at 12:04 AM, Ryan Rawson <ry...@gmail.com> wrote:

> Hi all,
>
> So I eventually figured out that HBase is reporting the 'request' metric in
> X second increments - 10 in my case from the config file.  Unfortunately
> that doesn't really seem to be an ideal solution...
>
> So I messed about, and I tried to replicate what was done in Hadoop
> Datanode, but all I ended up with was a counter of how many requests - not
> a
> rate.
>
> So I can't figure this out - how do we get a request rate in ganglia?  Is
> there a magic flag that needs to be set somewhere so ganglia can transform
> a
> counter into a rate?
>
> Or do we just need to do more work dividing our requests by how many
> seconds
> between reporting intervals?
>
> helpppp!
> -ryan
>