A possible wrapper for child process, as a baby step:

http://nodejs.org/api/cluster.html

It uses child process, but IPC (inter process communication) for
bidirectional communication. I'm not sure about Windows status of this
experimental feature



On Tue, Mar 4, 2014 at 9:30 AM, rtweed <rob.tw...@gmail.com> wrote:

>
>
> On Tuesday, 4 March 2014 12:12:44 UTC, ajlopez wrote:
>>
>>
>> Thanks!
>>
>> I mentioned the absent of acronym "translation" not for me, but for the
>> casual reader. It is a bit confused read a post with not defined acronyms.
>>
>> Ok, child process, but
>>
>>
>>    - Node.js Child Processes handle a single user request at a time
>>    - If no Child Process is available, incoming requests are queued
>>    - Child Process Pool size is configurable to match demand
>>    - Since a Child Process handles only on request, it can use blocking
>>    I/O and synchronous JavaScript logic
>>
>> That is not the node.js way/world. You don't need a child process pool in
>> node.js, am I right? Nor in meteor, with fibers.
>>
>
> On the face of it, it might not appear to be the conventional Node.js
> approach, but the queue/pre-forked process pool is an architecture used
> frequently in message queue-based systems, and works extremely well and
> very fast in Node.js.  Note that the Child Processes are pre-forked and
> remain running at all times - there's no startup / teardown overhead.
>
>
>> What is a Node.js Child Process, in your presentation?
>>
>> Google gave to me:
>> http://nodejs.org/api/child_process.html
>> A full OS process?
>>
>>
> See the Node.js documentation on Child Processes:
> http://nodejs.org/api/child_process.html
>
> They're a standard feature of Node.js
>
>
>> In your slide 24, you mention
>> "Node.js, but Synchronous Code!"
>>
>> But what if the code needs to make an http request, using
>> require('http')? The calls are async?
>>
>> My guess: you wrote sync code to access your mumps data. (like slide 20).
>> But you cannot do anything async in the back end function. Am I right?
>>
>>
> Correct - the side of EWD.js that handles incoming HTTP(s) and WebSocket
> requests and queueing them is fully async, adhering 100% to standard
> Node.js practice.  It's just the logic that requires access to the Mumps
> data within the child processes that you write as synchronous code.  Within
> that same logic you can, of course, make async calls out to other HTTP(s)
> services (or any other async APIs) - it's really not a problem or
> limitation.  Take a look at the Google Drive Synchroniser application that
> I package with the installation - it calls out asynchronously to Google
> Drive's APIs from a Child Process.
>
> I'd recommend running the installer, trying it out and see for yourself
> how it works in practice.
>
>  Rob
>
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