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This doesn't meet the requirements of the OP. This is traditional HA. The OP wants both live sharing the load.

- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 10/1/2018 3:35 PM, Paul Roy wrote:
It depends mainly of the application...

I was part of the implementation for one customer using locally written
software
HTTP load balancer
Power HA IBM i Cluster with 2 nodes and one switchable IASP replicated
with geographic mirroring containing the DB
Websphere ND application server (the primary node access the DB locally ,
the secondary node access the DB remotely)
legacy RPG applications accessing local PF/LF or DDM Files
SQLRPG accessing local or remote DB
local and remote data queues an data areas...
Switchover can be planned for system maintenance... without disruption
In case of HW problem on the primary node, the fail-over is done in less
than 10 minutes... (tested 2X/year but in 10+ years we only experienced
one failure on the secondary...)

so yes it's feasible... but should be carefully evaluated for 3rd party
software...

Paul




From: DrFranken <midrange@xxxxxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 01/10/2018 21:10
Subject: Re: HA load balancing solution
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



There are any number of devices out there that will do load balancing of
traffic inbound to the partitions. Some are not even expensive. The
challenge of course is the IBM i side. How do you let 'bob' do
transactions on one system while 'sue' does transactions on the other
system and keep them in sync?

THAT's a challenge!!

Seems like something big would need to be changed at the database level.

- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 10/1/2018 3:06 PM, Steinmetz, Paul wrote:
Anyone in the group running an HA load balancing solution?
I've heard of one vendor now offering this.
With this solution, there is no failover.
Two (or more) LPARs share the active load.
If one LPAR goes down for maintenance, (planned or unplanned) the other
LPAR continues to keep all apps running.
Not all applications (IBM and/or 3rd party) may support this, however?

Thank You
_____
Paul Steinmetz
IBM i Systems Administrator

Pencor Services, Inc.
462 Delaware Ave
Palmerton Pa 18071

610-826-9117 work
610-826-9188 fax
610-349-0913 cell
610-377-6012 home

psteinmetz@xxxxxxxxxx
http://www.pencor.com/




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