VL-Web/VLF-One/WAM Multi-tier Installation using IBM iSeries

[nick.diama]

Hi all,

We are using LANSA V14 SP2, EPC 142010.

Is it possible to setup an IBM i Front-End Web Server that through its listener will retrieve data from an IBM i Back-End Data/Application Server?
I can see that this is a valid option when having a Windows-IIS/Linux-Apache Front-End Web Server that through its listener retrieves data from a Windows/IBM i Back-End Data/Application Server.

What should be the extra configuration steps that we have to take in order for MOD_VLWEB.SRVPGM to function properly?
Should we add definitions to MOD_VLWEB data area residing in COMLIB?
Should we add definitions to httpd.conf?
Should we replicate the IFS structure to IBM i Web Server so that it can serve static & .js files (x_lansa subdirectory)?

Thanks in advance for your responses.

[dianejoester]

Hi Nick,

Multi-tier (Model B) for V14 web applications is only available using Windows or Linux web servers connected to the IBM i.

regards,
Diane

[nick.diama]

Hi Diane,

Are you implying that all the LANSA customers that right now have a multi-tier setup, with both front-end and back-end server being IBM i Servers will be forced in LANSA V14 to discard one of their IBM i Server?

What about the notion of upgrading an existing V13 with IBM i Front-End / IBM i Back-End Installation το V14?

Regards,
Nick.

[dianejoester]

Hi Nick,

You definitely do not need to change anything for existing web applications when upgrading to LANSA V14, they can continue to use an IBM i Web Server tier in a multi-tier setup. To be clear, all web applications built with pre-V14 web technologies will continue to support the use of an IBM i web server for multi-tier setup, you will not be required to remove the IBM i web server tier.

My reply was speaking of web applications built using new LANSA V14 web technology. These web applications must use either a Windows or Linux web server for multi-tier setup. This was the question that you appeared to be originally asking.

regards,
Diane

[nick.diama]

Hi Diane,

So, an existing multi-tier IBM i series setup can be upgraded to V14, can be functional for pre-V14 existing web applications, but at the same time, that existing multi-tier IBM i series setup, cannot be used for modern V14 VL-Web / VLF-One applications?

Any customer having an existing multi-tier IBM i series setup cannot use it to deploy modern V14 VL-Web / VLF-One applications?

No workaround for such cases?

Thanks in advance for your answer.

Regards,
Nick

[dianejoester]

Hi Nick,

No, there is not a workaround available.
Your pre-V14 web applications can also use a Windows or Linux web server for multi-tier with an IBM i application tier, so this could be considered as an option. This might also offer better security and performance.

regards,
Diane