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

it cannot use several cores at the same time so one node.js instance is

limited to what processing power one core is able to deliever.

Are you sure this is correct and do you have a source for your information
that we can review? Yes, Node.js runs as a single thread, but the
underlying C architecture of Node.js uses threads for blocking I/O calls
(i.e. file system, networking, etc). So that means, as I understand it,
that a single Node.js server could make use of many cores because of the
underlying C threads.

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


On Wed, Oct 14, 2015 at 9:15 AM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

Tim

I was not saying that a single node.js instance was glued to a specific
core
but it cannot use several cores at the same time so one node.js instance

is

limited to what processing power one core is able to deliever.

This is not IBM Power specific, it is the same on all hw platforms.

On Wed, Oct 14, 2015 at 3:40 PM, Kelly Cookson <KCookson@xxxxxxxxxxxx>
wrote:

Nathan,

Kelly is asking about a mix of both types of routing - External

routing

within a reverse-proxy / load-balancer as well as internal routing
within Node's own HTTP service.

That's correct. I think my concerns have pretty well addressed in

people's

responses. I probably want to use a combination of strategies for

setting

up routes. For example:

* use a web server as a reverse proxy that routes to node apps running

on

their own ports,

* use something like vhost or http-node-proxy within a node app that
routes to other node apps running on their own ports,

* use something like the ExpressJS router within a node app that routes

to

modules or sub-apps that run within the same port.

* use something like the ExpressJS router within a node app that routes

to

different pages of the app.

I don't need to worry so much about the number of ports used by node

apps.

I didn't hear that any of the routing strategies above would be better

or

worse when it comes to setting up a production environment for

fail-over

and load balancing--especially if I use a web server as a reverse

proxy.

And I didn't hear that any of the routing strategies above would be

better

or worse for scaling up node apps (e.g., clustering).

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 Nathan
Andelin
Sent: Wednesday, October 14, 2015 7:46 AM
To: Web Enabling the IBM i (AS/400 and iSeries)
Subject: Re: [WEB400] Hosting a Large Number of Node Apps on the IBM i

I am sure Kelly is talking about the top level routing to the app and
how to handle that as opposed to the question of internal routing to

"screens"

within the app.

Kelly is asking about a mix of both types of routing - External routing
within a reverse-proxy / load-balancer as well as internal routing

within

Node's own HTTP service.

How would one configure both so that a broadly-scoped system performs
well, scales well, you don't introduce too many HTTP restarts?
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Regards,
Henrik Rützou

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