Hello,
1. The livecache is a complete database? The oracle database is useless?
- If you installed the SCM application server on Oracle database, you run the SCM on the Oracle database.
Some SCM componects like APO need the liveCache database to run the applications.
The APO master data saved in SCM database and in liveCache. The APO transactional data < orders, TS data ... > are available only in liveCache on SCM system. In liveCache the objects stored in the class containers and can be accessed and manipulated only via LCA routines, for speed up the liveCache data loaded to memory for access . The registration of the LCA routines is done automatically when the liveCache on MAXDB is started in 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 (LCAPPS-Routines) together with the LiveCache on MAXDB.
Names of all prosedures, which have been called from ABAP, you can find executing 'lc10'
transaction on your SAP SCM system.
If you need to see the interfaces of the procedures, the LCA routines called in '/SAPAPO/OM' functions from ABAP, you may use 'se80' transaction and navigate in the Development class
'/SAPAPO/OM'.
See more details at
service.sap.com/scm
-> SAP SCM in DEtail ->TECHNOLOGY
"liveCache Overview"
2. In the normal progress, SPP communicate with livecache and oracle database?
- SPP (Service Parts Planning) is part of APO functionalities as DP or SNP on SCM system.
To run the SPP functionalities you need install the SCM application server and liveCache database.
If you install the SCM system on Oracle DB, you need the Oracle DB to run the appl. SCM system.
The applications will call the //om* functions, which called the LCa routiens to access the liveCache data and munipulate them, when it will be needed. It's dependednt on the application scenario & data, which you have.
3. The data in livecache and the oracle database is synchronized?
- On the SCM system the data should be consistent beetween liveCache, SCM Database and connected R/3 system.
Before the SCM application transaction committed successfully the data will be updated in liveCache, SCM DB and in connected R/3 system < if it needed > in sync.
Review the SAP note:
1723242 - SCM/APO and ERP consistency after liveCache recovery
Regards, Natalia Khlopina