|
Here's the kicker:
"With a little work, the previous code can be modified to utilize all of
the available cores on a machine. In the following example, the HTTP server
is refactored using the cluster module. cluster allows you to easily create
a network of processes which can share ports. In this example, a separate
process is spawned for each system core, as defined by the numCPUs
variable. Each of the child processes then implements the HTTP server, by
listening on the shared port."
He's talking about deliberate delegation of IBM i jobs (aka processes) so
multiple Javascript statements can be run in true parallel, which is not
possible with a single process. But this doesn't address the C threads
where Node.js APIs deliberately offload known I/O blocking to C threads.
When Node.js does that offloading there is in fact multiple cores being
used that originated from a single Node.js process (again, as I understand
it).
Thoughts?
Aaron Bartell
litmis.com - Services for open source on IBM i
On Wed, Oct 14, 2015 at 9:29 AM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:
Aaronis
here is a link ...
http://cjihrig.com/blog/scaling-node-js-applications/
On Wed, Oct 14, 2015 at 4:23 PM, Aaron Bartell <aaronbartell@xxxxxxxxx>
wrote:
it cannot use several cores at the same time so one node.js instance
callslimited to what processing power one core is able to deliever.information
Are you sure this is correct and do you have a source for your
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
it,(i.e. file system, networking, etc). So that means, as I understand
thethat a single Node.js server could make use of many cores because of
wrote: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>
specific
Tim
I was not saying that a single node.js instance was glued to a
KCookson@xxxxxxxxxxxx>instancecore
but it cannot use several cores at the same time so one node.js
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 <
routingwrote:
Nathan,routing
Kelly is asking about a mix of both types of routing - External
within a reverse-proxy / load-balancer as well as internal
thatrunningsettingpeople'swithin Node's own HTTP service.
That's correct. I think my concerns have pretty well addressed in
responses. I probably want to use a combination of strategies for
up routes. For example:
* use a web server as a reverse proxy that routes to node apps
on
their own ports,
* use something like vhost or http-node-proxy within a node app
noderoutesroutes to other node apps running on their own ports,
* use something like the ExpressJS router within a node app that
routesto
modules or sub-apps that run within the same port.
* use something like the ExpressJS router within a node app that
to
different pages of the app.
I don't need to worry so much about the number of ports used by
IBMbetterapps.
I didn't hear that any of the routing strategies above would be
orNathan
fail-overworse when it comes to setting up a production environment for
proxy.and load balancing--especially if I use a web server as a reverse
And I didn't hear that any of the routing strategies above would bebetter
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
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
iperforms
and
I am sure Kelly is talking about the top level routing to the app
tohow to handle that as opposed to the question of internal routing
routing"screens"
within the app.
Kelly is asking about a mix of both types of routing - External
withinwithin a reverse-proxy / load-balancer as well as internal routing
Node's own HTTP service.
How would one configure both so that a broadly-scoped system
mailingmailingmailingwell, scales well, you don't introduce too many HTTP restarts?
--
This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400)
mailinglist To post a message email: WEB400@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/web400
or email: WEB400-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives at
http://archive.midrange.com/web400.
--
This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400)
list
To post a message email: WEB400@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/web400
or email: WEB400-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/web400.
--
Regards,
Henrik Rützou
http://powerEXT.com <http://powerext.com/>
--
This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400)
list--
To post a message email: WEB400@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/web400
or email: WEB400-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/web400.
This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400)
--list
To post a message email: WEB400@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/web400
or email: WEB400-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/web400.
--
Regards,
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 subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/web400
or email: WEB400-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/web400.
This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400) mailing
list
To post a message email: WEB400@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/web400
or email: WEB400-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/web400.
As an Amazon Associate we earn from qualifying purchases.
This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].
Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.
midrange.com
