Adjust Test throughput (bandwidth)

[Dmitry Kurochkin]

Hi Michael.

Michael Hendrie <pmix at hendrie.id.au> writes:

> Hello,
>
> I'm using the standard polymix-4.pg config file and notice I get around 10:1 when looking at request:bandwidth, eg 200req/sec is around 20mbps
>
> I was hoping to increase the bandwidth while retaining the same request rate and have had some success by adjusting object sizes in the standard contents.pg file.
>
> Does anyone know if there is a better/easier way to achieve this, I notice there is "bwidth" PGL type but it is unclear to me if (and how) this can be used to set a fixed throughput.
>

Basically there are two ways to increase bandwidth:

* increase reply size (what you already did)
* increase request rate

Both increasing reply size and increasing request rate may be done in
several ways.  E.g. you can increase size for all content types or only
for images.  You may increase request rate of each Robot or you may
increase the total number of Robots.  In PolyMix-4.pg you can set
TheBench.peak_req_rate field to a higher value to increase the number of
Robots.

Note that there is no "right" way to increase bandwidth, it depends on
your test and goals.

As for the "bwidth" PGL type, it is just a convenient type for size/time
fraction.  AFAIK it is not currently used.

Regards,
  Dmitry

> Any help (and or examples) would be greatly appreciated.
>
> Thanks
>
> Michael.
>
>
>
>
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