[Building Sakai] NeoChat for production use?
Daniel Merino
daniel.merino at unavarra.es
Tue Feb 19 04:54:35 PST 2013
Hi everybody.
I don't understand very well if you are talking about Sakai's concurrent
users or NeoChat's concurrent users. Is the same? Does every Sakai user
launch a NeoChat connection even if he doesn't use it?
Being a quite small university, we have between 500 and 1000 concurrent
sessions per node. At least, that is what our sysadmin has told me...
Best regards.
Neal Caidin escribió:
> For the documentation, how about something like:
>
> "NeoChat - experimental feature - performance concerns exist for large
> installations. Guidelines - if deploying NeoChat it is recommended to
> deploy one app node per 250 concurrent sessions. While no issues have
> been found in performance tests to date, Neochat increases the number
> of requests sent to Sakai, so monitor your system closely. "
>
> ?
>
> -- Neal
>
>
> On Feb 19, 2013, at 7:20 AM, Adrian Fish <adrian.r.fish at gmail.com
> <mailto:adrian.r.fish at gmail.com>> wrote:
>
>> How many concurrent users? Each logged in user on a neochat enabled
>> Sakai will be polling every 5 seconds. The requests don't take long,
>> but still. If you expect 500 concurrent users you should probably
>> cluster with 250 on each of two app nodes. I don't see any problem
>> with those load levels.
>>
>> The only way to decrease the hit on the tomcats would be to start
>> using websockets so the polling can be dropped. I don't think enough
>> people are using websocket enabled browers yet for that to be
>> feasible. You could increase the poll interval but this reduces the
>> immediacy of the chat experience, thus defeating the object really.
>>
>> Adrian.
>>
>>
>> On 19 February 2013 12:08, Alexandre Ballesté
>> <alexandre.balleste at udl.cat <mailto:alexandre.balleste at udl.cat>> wrote:
>>
>> Did anybody try with big site? 5000+ users.
>>
>> Thanks!
>>
>> On 02/19/2013 01:05 PM, Juan José Meroño Sánchez wrote:
>> > I did some performance testing on it for 2.9.0 and I didn't
>> find issues,
>> > I think the confluence page needs qualifying too, but not
>> completely
>> > remove the warning.
>> > This feature (neochat) increases the number of requests sent to
>> sakai,
>> > so this needs a warning, but not a fatal message that will
>> scare people.
>> > Its also important to have people using the feature.
>> >
>> > Cheers.
>> >
>> > El 19/02/2013 11:50, Pablo San Roman Bengoetxea escribió:
>> >> Hi all,
>> >>
>> >> We are interested in NeoChat but we have seen in the document
>> of new
>> >> funcionalities (
>> >>
>> https://confluence.sakaiproject.org/display/DOC/Sakai+CLE+2.9+Release+Notes+-+What%27s+New
>> >> ) that it is not recommended for production, only for small scale
>> >> exploration. We are not sure if this state continues so we
>> would like to
>> >> know if somebody is currently using NeoChat in production.
>> >>
>> >> thanks,
>> >> Regards.
>> >>
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>>
>> --
>> Alexandre Ballesté Crevillén alexandre.balleste at udl.cat
>> <http://udl.cat/>
>> =====================
>> Universitat de Lleida
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--
Daniel Merino Echeverría
daniel.merino at unavarra.es
Gestor de teleformación - Centro Superior de Innovación Educativa.
Tfno: 948-168489 - Universidad Pública de Navarra.
--
Tener hijos es muy fácil. Les puedes enseñar a odiar lo que tú odias, y
con eso de internet se te crían solos. (Homer Simpson)
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