Use Of Live Cache

[Former Member]

Hi,

I came to know only SAP SCM (among SAP products) uses live cache.

Is there any specific reason why only SCM module uses live cache and not others.

Best Regards,

Siva.

[Former Member · Accepted solution]

Hi Markus,

Then all other modules of SAP can use it right?

Regards,

Siva.

[markus_doehr2 · Accepted solution]

No.

Livecache is developed especially and only for SCM (as of now) - no other "module" or application uses it.

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Markus

[former_member204746 · Accepted solution]

well, SCM before was called APO... so APO was also using LiveCache..

LiveCache is a SAPDB (or maxdb) database that is totally loaded in memory. This makes DB operations much faster than databases on disk.

SCM/APO uses a lot of calculations and scenarios that is very intensive on the DB. so, this is why it uses a memory-DB.

I hope this answers your questions.

[former_member229109 · Accepted solution]

Hello Siva,

1) Please review the SAP documents at

service.sap.com/scm -> SAP SCM Technology

"Architecture overview" & "liveCache overview" for SCM 5.0

Also you could see the information about earlier SCM releases.

&& at

service.sap.com/liveCache

2) For the new release please review information at

https://www.sdn.sap.com/irj/sdn/wiki?path=/display/maxdb/main&;

-> MaxDB liveCache Release 7.7

< -> liveCache Applications (MaxDB) >

3) As you know objects stored in the liveCache class containers can be accessed and manipulated only via LCA < in the old releases COM > routines which are methods of LCA objects. The registration of the LCA routines is done automatically when the liveCache is started by the LC10, check the lcinit.log file. The shared procedures in the LiveCache are written in C++ and shipped to the customers as binary shared libraries LCA-routines (COM-Routines in old releases ) < 'APO LC APPS' database software package> together with the LiveCache. The original C++ source code of the libraries is not generally available to the customers.

Names of all procedures, which have been called from ABAP, you can find executing 'lc10' transaction on your SCM system. You could review all registered LCA routines in the lcinit.log file, for example,

or in LC10 -> liveCAche:Monitoring -> Problem Analysis -> Database Procedures

If you need to see the interfaces of the procedures, you may use 'se80' transaction and navigate in the Development class '/SAPAPO/OM'.

4) And if you have your application scenario- project, where you would like to use liveCache please let us know.

Thank you and best regards, Natalia Khlopina

Message was edited by:

Natalia Khlopina

[markus_doehr2]

LiveCache is an "In-memory"-object database, SCM adds application functionality (e. g. demand planning) to the database itself (as a C++ program/library).

Because SAP has only the sourcecode for their own database (SAPDB/MaxDB), it´s only developed for their database.

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Markus