A customer has an existing IBM E850 HA cluster that they are using for the SAP DB. They want to use HANA
and would like to have the E850 to be repurposed for this.
The E850 is a 32-core 1TB server with all cores and memory active. Only 50% of the memory is populated
using 64GB CDIMMs. The HANA DB requires 3TB.
What would need to be done, if anything, to support this requirement?
A.
Purchase the E850 HANA edition specifically configured for SAP.
B.
Add sixteen 128GB CDIMMs and activate another 2TB of memory.
C.
Fill all memory slots with 128GB CDIMMs and activate another 2TB of memory.
D.
Nothing can be done because the E850 only supports a maximum of 2TB.
Explanation:
Memory is ordered in pairs of the same memory feature. Both CDIMMs of a CDIMM pair must be installed in
the slots supporting one processor. Different size pairs can be mixed on the same processor module’s slots.
For optimal performance, all pairs would be the same size. Also for optimal performance, generally the amount
of memory per processor module would be the same or about the same.
Note: The Power E850 servers provides 128 GB to 4 TB high-performance 1600 MHz DDR3 or DDR4 ECC
memory with L4 cache:
16 GB CDIMM DDR3 Memory (#EM86)
32 GB CDIMM DDR3 Memory (#EM87)
64 GB CDIMM DDR3 Memory (#EM88)
128GB CDIMM DDR4 Memory (#EM8S)As the customer memory requirements increase, the system capabilities are increased as follows:
With two processor modules installed, 16 CDIMM slots are available, minimum memory is 128 GB.
With three modules, 24 CDIMM slots are available, minimum memory is 192 GB.
With four modules 32 CDIMM slots are available, minimum memory is 256 GB. Four CDIMMs are available per
socket. The more CDIMM slots that are filled, the larger the available bandwidth available to the server.
https://www-01.ibm.com/common/ssi/printableversion.wss?docURL=/common/ssi/rep_sm/2/877/
ENUS8408-_h02/index.html