Re: Hosting a Large Number of Node Apps on the IBM i -- WEB400

Henrik,

You make a valid point. If you want to run a lot of the PHP-based social media apps out there, it makes more sense to run Zend or Apache.

I'm not interested in this scenario for my workplace. We're not looking for PHP-based social media apps. We're looking to do things like replace 5250 green screens (going forward), developing custom apps for our SharePoint employee portal, and developing custom web and mobile apps for our employees to perform their business processes.

I expect Zend, Apache, IIS, WebSphere and NGiNX would all be capable of meeting our needs for web servers.

Thanks,

Kelly Cookson
IT Project Leader
Dot Foods, Inc.
1.217.773.4486 ext. 12676
kcookson@xxxxxxxxxxxx

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Henrik Rützou
Sent: Wednesday, October 14, 2015 12:43 PM
To: Web Enabling the IBM i (AS/400 and iSeries)
Subject: Re: [WEB400] Hosting a Large Number of Node Apps on the IBM i

Kelly

I wouldn't put to much into that numbers. Most private homepages on the net runs PHP and apache if they run free CMS like Wordpress or others.

On Wed, Oct 14, 2015 at 7:39 PM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

Hi Aaron

and my apologies if I was a little rough on you ;-)

On Wed, Oct 14, 2015 at 7:34 PM, Aaron Bartell
<aaronbartell@xxxxxxxxx>
wrote:

Hi Henrik,

My apologies if I stated libuv was part of the Javascript language.
Other than that, yes, it appears we are on the same page now.

Aaron Bartell
litmis.com - Services for open source on IBM i

On Wed, Oct 14, 2015 at 12:19 PM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

Aaron

so we agree, libev/libuv isn't part of the javascript language but
is a

C

program that runs under V8 excluselive on servers under node.js as
a npm and it may be multi-threaded just as a call to a java class
may run multi-threaded if call from an ILE (RPG) program.

On Wed, Oct 14, 2015 at 7:07 PM, Aaron Bartell
<aaronbartell@xxxxxxxxx>
wrote:

Hi Henrik,

Agreed, the Javascript runtime is single threaded. It is libuv
that

makes

threads happen. Here is an excerpt from the URL I forwarded

earlier**.

"How the I/O is run in the background is not of our concern, but
due

to

the

way our computer hardware works, with the thread as the basic
unit of

the

processor, libuv and OSes will usually run background/worker
threads

and/or

polling to perform tasks in a non-blocking manner."

Again, Javascript runtime is still single threaded BUT when it
makes a

call

to libuv, that libuv call could be to spawn a new thread within
that

same

process to do things that would cause the Javascript runtime to

block. I

see Nathan has responded and he explains it better than I have.

**https://nikhilm.github.io/uvbook/basics.html

Aaron Bartell
litmis.com - Services for open source on IBM i

On Wed, Oct 14, 2015 at 11:49 AM, Henrik Rützou <hr@xxxxxxxxxxxx>

wrote:

Aaron

what you are stating doesn't make sense. Javascript is known as
a

single

threaded
event driven and asynchronously (not to be confused with

muli-threaded)

OO

language
(Class or Prototype based).

Google's V8 javascript machine that runs in your chrome browser
is

exactly

the same that
the one that runs in node.js.

Putting a layer benieth it om a server that just executes

instructions

here

and there would
completely ruin the language and the JVM since you can't be
sure

that

one

instruction in line
100 is processed before line 101 that may rely on result in
line

100 is

finished.

On Wed, Oct 14, 2015 at 6:38 PM, Nathan Andelin
<nandelin@xxxxxxxxx

wrote:

I'm always open to other points of view.

There seems to be general agreement about external

reverse-proxies /

load-balancers being an effective means of "routing" work to

multiple

Node.js instances (Jobs), which ensures scalability and
fail-over

support.

There doesn't seem to be much distinction whether one uses
IIS,

NGiNX,

Apache, or whatever for external request routing.

It would be nice to see some benchmarks pertaining to Node's

internal

load-balancing via the "Cluster" module. I'd be a bit wary of
it

after

just

reading the documentation.

The question that has me the most stumped is the one about

"routing"

potentially thousands of URLs to appropriate JavaScript
routines,

with

each

routine pertaining to various "applications" within "modules"

within

"major-system-areas" (however you organize you broadly-scoped

services)?

Kevin indicated that Node has to be restarted each time a
routing configuration changes in Sails. Inline-coding of
routes in Express obviously suffers from the same problem.
I'd be concerned about

performance

as the number of URLs increase.
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http://powerEXT.com <http://powerext.com/>
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Henrik Rützou

http://powerEXT.com <http://powerext.com/>
--
This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400)
mailing list To post a message email: WEB400@xxxxxxxxxxxx To
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or email: WEB400-request@xxxxxxxxxxxx Before posting, please take a
moment to review the archives at
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This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400)
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or email: WEB400-request@xxxxxxxxxxxx Before posting, please take a
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Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/>