John,

Thank you for this information.  We have looked at NGINX previously, but in a 
different role.  I'll do some additional research on this, because as an OEM I 
may have more control installing this on our customer's hardware, than telling 
them they need to purchase load balancing hardware.

Best,


Steve


-----Original Message-----
From: 4D_Tech <[email protected]> On Behalf Of John DeSoi via 4D_Tech
Sent: Tuesday, January 28, 2020 6:06 PM
To: 4D iNug Technical <[email protected]>
Cc: John DeSoi <[email protected]>
Subject: Re: 4D Application as a 3-tier System

NGINX is also a popular option as a load balancer. Free and open source.

https://docs.nginx.com/nginx/admin-guide/web-server/reverse-proxy/

It can also proxy non-http protocols. I wonder if the silly "must be 3 tier" 
requirement could be satisfied by putting NGINX in in between 4D Client and 4D 
Server :).

John DeSoi, Ph.D.


> On Jan 28, 2020, at 4:50 PM, Dennis, Neil via 4D_Tech <[email protected]> 
> wrote:
> 
>>    1. What options are available?
>>    2. How it works with 4D?
>>    3. Has anyone done this as an OEM and what issues/obstacles have you run 
>> into?
>>   4. and so forth...
> 
> ... As was said before a load balancer... it is a device that is put in front 
> of a pool of machines. It balances the load between applications:
> 
> https://www.f5.com/services/resources/glossary/load-balancer
> 
> 1 - There are many different types and prices for load balancers
> 2 - They work with 4D by same as other web servers, they route requests 
> between servers... each 4D client would be a pool member.
> 3 - Yes
> 4 - Not really much more to say... load balancers can be configured in a 
> round robin type setup or keep persistence for a user so they follow the same 
> path.

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