Actually, <script> tags load sequentially, I believe. (Not sure about  
css.)

--
Robin D. Wilson



On May 11, 2009, at 10:28 AM, "André Warnier" <a...@ice-sa.com> wrote:

> Nenad Kovacevic wrote:
>>
>> Caldarale, Charles R wrote:
>>>
>>> Have you considered doing the SSL processing in the load  
>>> balancer(s)?  It
>>> would make life simpler.
>>>
>>> - Chuck
>>>
>>>
>>
>>> From application's perspective it really does not make much of a  
>>> difference
>> where SSL is done - actually it does make now after your  
>> explanation -
>> thanks for that - however this change would need to be run and  
>> approved by
>> our networking and security people first. In any case I am afraid  
>> that even
>> if they are willing to move SSL processing to the balancers this  
>> change may
>> not happen in time for our first application, so we might end up  
>> with the
>> setup as I described it in my original post.
>>
>> Our applications do not issue concurrent requests to the servers,  
>> i.e. they
>> are classical web applications where the user activates a control  
>> on a page
>> and then waits for a page to refresh or a new page to load.  
>> Therefore under
>> normal usage scenarios concurrent requests should really not  
>> happen. I say
>> normal as it is possible for a user to resubmit a request by  
>> reloading a
>> page using browser controls. However we warn the users to use only  
>> controls
>> on the page and gray-out submit buttons once a request is submitted  
>> so
>> hopefully this should not be an issue.
>>
>> With such an application in mind would you see an issue with not
>> implementing sticky session? Again, I was able to test that and the  
>> only
>> issue that I am seeing is that JSESSIONID changes depending on what  
>> Tomcat
>> instance processed it, but again, I am not sure if that is really  
>> an issue
>> or not?
>>
> Not sure if it is relevant here :
> a browser will make (quasi-)concurrent requests to the server, for
> example when you load a html "frames" document.  The first request  
> will
> be for the frames document itself, but as soon as that one is  
> returned,
> each <frame> in it will be the object of a new request.
> A similar case happens when a document merely contains <img> or  
> <style>
> or <script> tags.  To "fill these slots", the browser will issue  
> several
> requests (and probably establish several connections) in parallel.
> I know that this kind of thing can play havoc with some authentication
> schemes for instance.  Again, I don't know if it is really a cause for
> concern in this situation.
>
>
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