Re: DWR Scalabilty And Early Closing Mode

So would DWR in Full Streaming or Early Closing mode running on Websphere be
able to handle the 10,000 concurrent users that LightStreamer advertises
that it can handle?  Also, is it possible to integrate DWR with
LightStreamer or Flex Blaze DS servers?

Joe Walker-3 wrote:
>
> DWR does a lot to protect the server against overloading. In the case of
> Websphere, there is no custom plugin for their async servlet, so we fall
> back to the servlet-api implementation which backs off connection numbers
> to
> prevent overloading things.
>
> Early closing mode is there to prevent buggy proxies messing with the
> responses - it's not about reducing load.
>
> What kind of latencies are important to you? If you're ok with latencies
> of
>> 60 seconds, then you can configure DWR to poll, which should reduce the
> server load.
>
> Joe.
>
> On Sun, Mar 16, 2008 at 4:30 PM, r123 <ronberna@...> wrote:
>
>>
>> We have a project that will run on a Websphere 6.1 server that needs to
>> send
>> data to the web client in real or near real time.  The data will be read
>> from a JMS topic. We are considering using DWR "Reverse AJAX" to help
>> push
>> this data from the web server to the web client.  There are some concerns
>> about how this would scale as well as failover.  There is also a concern
>> about the "push" vs. "pull" concept.
>>
>> I read some about Early Closing Mode in DWR.  If I understood this
>> correctly, DWR will close the http connection after 60 seconds if there
>> is
>> no activity.  A question I have is does it release the socket or thread
>> once
>> that connection is closed?   Would this approach be able to scale to
>> thousands of clients or would a dedicated server component like Tibco
>> "Ajax
>> Messaging Service" which uses LightStreamer be needed in order to handle
>> large numbers of clients?  The disadvantage I read about Early Closing
>> Mode
>> is that many clients may possibly try to re-connect at the same time.
>> How
>> big of an issue is this?
>>
>> Any ideas on this would be greatly appreciated.
>>
>> Thanks
>> r123
>> --
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>>
>>
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>
>

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