On 8 Oct 2008, at 17:32, Robert Walker <[EMAIL PROTECTED]
s.net> wrote:
>
>> is a single thread(ruby green thread) created for everyone request?
> I'm going to go out on a limb here since no others have responded, but
> my understanding (at least in the current version of Rails) is no. I
> don't believe than a thread is created at all. It is my understanding
> that the Rails application instance is a single processes thread that
It probably depends on what hosts rails. For example mongrel is most
definitely multithreaded and can handle multiple concurrent requests,
just not concurrent requests handled by rails.
Fred
>
> handles the request all the way through to the response. The Rails
> application instance will block from the time it receives a request to
> the time it completes the response.
>
> To handle requests concurrently you need to have multiple Rails
> processes running. Typically you would use a Mongrel cluster for this.
> For best performance you also need a load balancer that is smart
> enough
> to know not to send a request to a busy Rails instance, otherwise,
> that
> request will be blocked until the Rails process completes it's current
> request.
>
> However, my understanding is the Mongrel, or Thin or whatever is
> concurrent and will queue up the request that it sends to the Rails
> instance for processing.
>
> That being said this is not that unusual. I believe that PHP
> applications would work in a similar way. They would spin up a process
> to handles each request. One process handling one request.
>
> This is actually a safe and scalable solution. Threading is HARD! And,
> it's dangerous if not done correctly. And in the end it doesn't really
> help you scale as much as you might expect.
>
> I'll reiterate that this is my own understanding of this, and I
> could be
> completely off-base.
>
> Pokkai Dokkai wrote:
>> i don't understand that request ... response process in rails
>> framework
>> .
>>
>> is a single thread(ruby green thread) created for everyone request?
>> then that single thread will be living upto the response send.
>> am i correct ?
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
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