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From: Emilian Bold <emilian.bold@gmail.com>
Date: Wed, 30 Aug 2017 16:39:57 +0300
Message-ID: <CAL6R17DD1j8LzjrtzDo+jiELPZnCKtcFRoZynJFnBVN4MsmJHg@mail.gmail.com>
Subject: Re: Is there a high level explanation of the JMeter remote execute architecture?
To: "JMeter Dev@" <dev@jmeter.apache.org>
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archived-at: Wed, 30 Aug 2017 13:40:42 -0000

> Yes, but the main issue is not serialization from client to server on test start, but the reverse side

Still, why is the MainFrame added to the test tree? All I could think
of is you need the TestStateListener which the MainFrame implements.

Do you need any Swing components on the slave side?

> But I think there should be better protocols than RMI now

Ideally something that needs a single standard port open (443 / HTTPS)
on the slave.

What kind of effort would such a migration imply?

--emi


On Wed, Aug 30, 2017 at 11:51 AM, Philippe Mouawad
<philippe.mouawad@gmail.com> wrote:
> Hi Emilian,
> My answers inline.
>
> Regards
>
> On Wednesday, August 30, 2017, Emilian Bold <emilian.bold@gmail.com> wrote:
>
>> Hello,
>>
>> I am looking at two aspects in the JMeter codebase: RMI and serialization.
>>
>> I don't believe I've ran into a document explaining the architecture
>> here, only documents explaining how to configure JMeter as an user.
>>
>> So, about RMI, the way I see it you have two "channels":
>>
>> * a control channel where the master starts/stops/provisions the slaves and
>> * a results channel where result data is streamed back (which is also
>> the most bandwidth intensive)
>
>
> Correct understanding
>
>>
>> Is this correct? What other communications happen between the master and
>> slave?
>
>
> None I think about
>
>>
>> Regarding serialization: why is so much serialized?
>>
>> I saw this line in RemoteStart
>>
>> > testTree.add(testTree.getArray()[0], gui.getMainFrame());
>>
>> and it makes no sense to me to serialize the main frame itself. Maybe
>> this is just done because MainFrame implements TestStateListener so
>> you actually just want to provide a TestStateListener?
>
>
> Yes, but the main issue is not serialization from client to server on test
> start, but the reverse side
>
>>
>> I understand why you would send the model but why the whole GUI?
>
>
> Historical
>
>>
>> I feel there is some historic and architectural info I am missing
>> here. Where is the API boundary between the GUI, the model and the
>> engine?
>
>
> Should be created.
> But I think there should be better protocols than RMI now
>
>>
>> --emi
>>
>
>
> --
> Cordialement.
> Philippe Mouawad.