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Hello everybody,

I am have a customer that has about 2.200 users who should use a MobiLink/UltraLite based application. The options for deployment are either a on premise MobiLink installation or SAP Cloud Platform with RDS.

Now I know that the number of users is only one of many information required to do proper sizing, that's why I do not ask you for any numbers. But how would we tackle the topic of sizing?

  • Is there any good resources about that?
  • How does the SAP cloud platform with RDS compare to on premise MobiLink when it comes to sizing?
  • Are there any customer examples with similar user size for which you could share the sizing?

Thank you in advance for your help and happy Easter!

Best regards, Alex

asked 14 Apr '17, 06:29

Alexander%20Ilg's gravatar image

Alexander Ilg
accept rate: 50%

Just to understand:

RDS means "SAP HANA remote data sync", as described here?

(If that is correct, would that not mean that it's primarily a question what database is used as consolidated - if it's HANA, use RDS, otherwise, use "normal" MobiLink...?)

(18 Apr '17, 04:14) Volker Barth

The key to properly sizing a machine (or machines) where the ML Server(s) is/are running is based on three things in general :

  1. The average and/or maximum number of concurrent syncrhonizing you expect to be active at any given time.
  2. The average and/or maximum size of the upload and/or download
  3. Most importatnly, YOUR testing in YOUR environment, because every situation is different.

In a perfect world you would love to have enough physical memory available to the MobiLink Server(s) to hold all the data for all active synchronizations. You need to decide how paranoid you want to be, and whether you are sizing so that you can handle the largest downloads with near maximum concurrent synchronizations, or whether you are sizing based on averages.

When considering on premise versus SAP Cloud Platform, the most important thing to consider is that disk space on premise is super cheap, but disk space in any hosted environment is not. When MobiLink runs out of physical memory to store upload/download data, it will spill the extra data to disk, so having enough physical memory and disk swap space to handle the worst case scenario is important. When considering the worst case scenario, you should also have in the back of your mind that user or two (or seven) that hasn't synchronized in a long time, and may have a larger thatn normal upload or download.

Specifics on sizing/pricing of resources in the SAP Cloud Platform or reference customers that have documented and are willing to share their experiences is something you'll likely need to talk to sales about. This forum is mostly filled with technical people.


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answered 18 Apr '17, 14:22

Reg%20Domaratzki's gravatar image

Reg Domaratzki
accept rate: 37%

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question asked: 14 Apr '17, 06:29

question was seen: 1,398 times

last updated: 18 Apr '17, 14:22