Re: IWS REST API performance questions

Other than what Jim has noted - the big thing you need to remember with IWS is that you are dealing with Java. I tell my clients that IWS is fantastic for proof of concept and medium transaction volumes, but for high volumes you really need Java/Websphere tuning expertise. Same often applies to debugging problem areas.

If gaining that expertise is going to cost you big $s, then you might consider other similar tooling from folks like Eradani, Rocket, Midrange and others.

Jon Paris

On May 10, 2021, at 10:56 AM, Kelly Cookson via WEB400 <web400@xxxxxxxxxxxxxxxxxx> wrote:

We may adopt IWS REST APIs in our shop. However, I have concerns about performance. I am *not* concerned that IWS REST APIs cannot perform well. I have heard from more than one person that shops have achieved good performance with IWS APIs at high volumes of requests. I assume it is possible to get the kind of performance we want from IWS REST APIs.

The question is whether or not *our shop* will be able to achieve that good performance.

1. If achieving good performance with IWS REST APIs requires a relatively big IBM i or additional partitions for conceptual load balancing or something else that might involve significant new investments in hardware, then I would like to know this. This would not necessarily be a deal-breaker. But I would like to know what to expect in advance. (I know this is hard to answer without the specifics of our system. I am looking for a general description of what size/configuration of an IBMi system is needed to handle a high volume of REST API requests-defining high volume however you want-with good performance.)

2. I know the "Integrated Web Services Server Administration and Programming Guide" contains suggestions for performance tuning. However, most of the suggestions involve things that are new to us. if we need help to optimize the various performance tuning options mentioned in the programming guide, where can we turn to for more detailed help? Can we get help from IBM, for example?

Thanks,

Kelly Cookson
Senior Software Engineer II
Dot Foods, Inc.
1-217-773-4486 ext. 12676
www.dotfoods.com<http://www.dotfoods.com>

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