[Red5devs] Question Regarding Load Testing RTMP

[Steven Gong]

Hi Mabrek,
I doubt if PlayEngine.pullAndPush causes the live delay and it should not be
called by PlayEngine in live mode - pullAndPush() is only used in vod mode.

I guess the longer delay is caused by the sequential execution of the
pushMessage when a live AV message comes in. For 3k users, the live message
will be pushed to the clients one after another - think of the delay caused
to the last user that got this message.

While in vod mode, pullAndPush synchronizes on the play engine object itself
which belongs to one user only, so it won't affect other users.

On Mon, Sep 1, 2008 at 4:33 PM, mabrek <mabrek at gmail.com> wrote:

> RTMPClient from trunk is usefull for load testing. Make a search through
> users maillist for Red5Bench  and FLVRecorder
> http://www.nabble.com/RedBench-to16173475.html , it can be used as a base
> for your load testing application.
> Beware, RTMPClient consumes more resources per user than server. Don't
> forget to increase ulimit -n (number of open files) if you are on linux and
> decrease -Xss (jvm stack size) to run many threads.
> From my results I can conclude that one server instance can handle about 3k
> concurrent users watching live stream and delay between streams sent and
> received can be up to 20 seconds (more users - longer delay). Profiling
> showed that PlayEngine.pullAndPush synchronized method causes it, lock is
> aquired too often an too many threads waits on it.
>
>
> On Sun, Aug 31, 2008 at 2:49 AM, Scotty G. <scottyg at gmail.com> wrote:
>
>> Greetings,
>>
>>   Hello world to the Red5 devs.
>>
>>   We're building an AIR application and would like to utilize RTMP for
>> both rpc and push communication. We're also looking to push a large amount
>> of traffic between our AIR clients and back-end system (i.e. 20k concurrent
>> end-users). Does anyone have a recommendation for a load-testing strategy
>> for RTMP? I've downloaded the Red5 source and have been playing with the
>> RTMPClient. Is this the basis for Red5's load testing harness? Any
>> suggestions and/or information is greatly appreciated.
>>
>> Thanks,
>> Scott
>>
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>>
>
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-- 
Best Regards
Steven Gong

InfraRed5 Red5 Consultant: http://www.infrared5.com, steven at infrared5.com

Red5 Developer: http://osflash.org/red5,
http://jira.red5.org/confluence/display/~steven/Home

Javaflash Project Founder and Maintainer: http://osflash.org/javaflash
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