Re: How to randomize active robots

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Hi Alex,

Thanks for the reply. The second part of your reply has detailed
explanation for my question and possible solution. And it is very useful
feature.

For now, I will play with idle and busy period durations and see if
can achieve my requirements.

Thanks,
Krish.

On Wed, Mar 9, 2016 at 10:50 AM, Alex Rousskov <
[email protected]> wrote:

> On 03/08/2016 12:24 AM, perf tester wrote:
>
> > I would like randomize the active robots. For example, Out of 100
> > robots configured in the test, i can limit 5 robots to be active. But
> > the same robots are used for the entire test duration. I would like
> > the tool to pickup the next 5 robots from the remaining 95 robots
> > configured until all the robots are used 5 at a time.
>
> You would like Polygraph to "pickup the next 5 robots" _when_?
>
> If your requirements are flexible, and you do not need Polygraph to
> maintain exactly N active robots at any given time, then you may be able
> to achieve something similar using Robot sessions:
>
>
> http://www.web-polygraph.org/docs/reference/pgl/types.html#type:docs/reference/pgl/types/Session
>
> I have not tested it, but I suspect that by selecting the right
> combination of average idle and busy period durations while randomizing
> idle_period_duration, you may achieve a steady state where 5
> random/different robots out of 95 robots are active at most times.
>
>
> If you need more precise control and convenience, then Polygraph changes
> would be required. For example, one could add PGL knobs that would
> replace one active robot with another while maintaining a configured
> robot population level. Polygraph already has code to maintaining a
> configured robot population level, but it currently does not add or
> remove robots unless that level changes. This would be a generally
> useful feature IMO.
>
>
> HTH,
>
> Alex.
>
>

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<div dir=3D"ltr">Hi Alex,<div><br></div><div>Thanks for the reply. The seco=
nd part of your reply has detailed explanation for my question and possible=
 solution. And it is very useful feature.</div><div><br></div><div><span st=
yle=3D"font-size:12.8px">For now, I will play with=C2=A0</span><span style=
=3D"font-size:12.8px">idle and busy period durations=C2=A0and see if can=C2=
=A0achieve=C2=A0my requirements.</span></div><div><span style=3D"font-size:=
12.8px"><br></span></div><div><span style=3D"font-size:12.8px">Thanks,</spa=
n></div><div><span style=3D"font-size:12.8px">Krish.</span></div></div><div=
 class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, Mar 9, 2016 a=
t 10:50 AM, Alex Rousskov <span dir=3D"ltr">&lt;<a href=3D"mailto:rousskov@=
measurement-factory.com" target=3D"_blank">[email protected]=
</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=3D"">O=
n 03/08/2016 12:24 AM, perf tester wrote:<br>
<br>
&gt; I would like randomize the active robots. For example, Out of 100<br>
&gt; robots configured in the test, i can limit 5 robots to be active. But<=
br>
&gt; the same robots are used for the entire test duration. I would like<br=
>
&gt; the tool to pickup the next 5 robots from the remaining 95 robots<br>
&gt; configured until all the robots are used 5 at a time.<br>
<br>
</span>You would like Polygraph to &quot;pickup the next 5 robots&quot; _wh=
en_?<br>
<br>
If your requirements are flexible, and you do not need Polygraph to<br>
maintain exactly N active robots at any given time, then you may be able<br=
>
to achieve something similar using Robot sessions:<br>
<br>
<a href=3D"http://www.web-polygraph.org/docs/reference/pgl/types.html#type:=
docs/reference/pgl/types/Session" rel=3D"noreferrer" target=3D"_blank">http=
://www.web-polygraph.org/docs/reference/pgl/types.html#type:docs/reference/=
pgl/types/Session</a><br>
<br>
I have not tested it, but I suspect that by selecting the right<br>
combination of average idle and busy period durations while randomizing<br>
idle_period_duration, you may achieve a steady state where 5<br>
random/different robots out of 95 robots are active at most times.<br>
<br>
<br>
If you need more precise control and convenience, then Polygraph changes<br=
>
would be required. For example, one could add PGL knobs that would<br>
replace one active robot with another while maintaining a configured<br>
robot population level. Polygraph already has code to maintaining a<br>
configured robot population level, but it currently does not add or<br>
remove robots unless that level changes. This would be a generally<br>
useful feature IMO.<br>
<br>
<br>
HTH,<br>
<br>
Alex.<br>
<br>
</blockquote></div><br></div>

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