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Re: Standalone HANA Vs BW on HANA

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Hi,

 

I would not consider points 2, 3, 5 & 9 as much differentiation.

 

From tools perspective, if you buy enterprise HANA license you will get both SLT and BODS included in the bundle. Hence, the comparison becomes whether you want to use BW as your data warehouse application or you want to develop a custom data warehouse on HANA using BODS, SLT and HANA modeler. Here is my opinion based on my personal preferences and biases.

 

Advantages of BW as data warehouse:

1. Standard BW extractors are available for easier access to data that does not need in-depth understanding of SAP ERP entity relationships.

2. Modelling tools are easier to use

3. Data warehouse management is much easier (central monitoring and management of ETL process)

4. Easy to implement hierarchies.

5. Planning functionality (integrated planning) is available.

6. Full functionality of SAP Netweaver platform is available for custom development.

 

Disadvantages of BW:

1. BW does not conform to a puristic vision of a data warehouse in some practioners' mind. Please note that this will become a religious topic once you enter into this argument.

2. BW extractors can sometimes be a pain when you need to bring in additional fields and recapture historical data for the additional fields.

3. Reuse of KPIs can be problematic if they are defined using BEx query designer at a cube or multiprovider  level.

4. Needs BODS to get data from Non SAP sources (unless you want to use flat file upload)

 

 

Advantages of HANA (Enterprise license)

1. Complete freedom to develop data warehouse as per your wish (religion).

2. Powerful modelling tools

3. BW extractors in SAP ERP can be used  (DXC method) to get SAP ERP data.

4. Any KPI defined at analytic view or calculation view is visible in higher level calculation views. Hence, high degree of KPI reuse. This avoids duplication of KPIs .

5. Can easily integrate with any applications developed in HANA XS, Java, .Net or ABAP technologies using ODBC, JDBC, ADBC connectors.

 

Disadvantages of HANA

1. Expensive to license.

2. Monitoring and management of data warehouse will be distributed between HANA, BODS and other tools.

3. No guided process for developing models. Requires lot of self discipline to develop and adhere to development standards and best practices.

4. Hierarchy functionality requires IT support and cannot be maintained by end users like in BW.

5. BW has very easy and versatile functionality for Currency conversion and Units of measure conversion (especially using material alternate unit of measures of SAP ERP). Implementation in HANA is not that flexible.

 

Kumar


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