[Info-vax] How would you load balance excess webserver traffic between multiple OpenVMS servers?

[Arne Vajhøj]

On 1/13/2021 5:36 PM, Dirk Munk wrote:
> ultr... at gmail.com wrote:
>> On Wednesday, January 13, 2021 at 9:03:50 AM UTC-5, Dirk Munk wrote:
>>> D W wrote:
>>>> There are MULTIPLE different approaches to doing this. Most involve 
>>>> HTTP (web) cookies and may involve DNS round robin load balancing or 
>>>> load balancers.
>>>>

>>> You could use a DNS server with round robin functionality. That way you
>>> can use multiple IP interfaces on one VMS server, as well as more VMS
>>> servers.
>>>

>> do you mean like port forwarding or a www1. type of solution? I'm 
>> going to implement DNS services on their system just in case for 
>> redundancy.
> 
> No, round robin is very simple.
> 
> let's say you have 4 vms ip interfaces for you server, they can be on 
> one server (4 interfaces) or two servers (2 x 2 interfaces) or 4 
> servers. The IP addresses are 10.0.0.1 , 10.0.0.2 , 10.0.0.3 , and 
> 10.0.0.4 , so very simple.
> 
> With a round robin dns server, you will create a host www.myvms.com , 
> and give that host all four IP addresses.
> 
> When you open a connection to www.myvms.com , it will go to 10.0.0.1 . A 
> second later it will go to 10.0.0.2 , and again a second later to 
> 10.0.0.3 , and then to 10.0.0.4. , and finally back to 10.0.0.1 , and so 
> on.

The key question is what happens if 10.0.0.2 is down.

Arne