content_image/1013990.jpg
Figure 1 shows the components and how critical they are to the system. Each component is described in this document. 

<img src='content_image/1013990.jpg'>

The following acronyms are used in Figure 1: 

Remote Power Controller/Power Distribution Unit (RPC/PDU)  

Snippet Processing Unit (SPU)  

Advanced Management Module (AMM)  

Environmental Services Module (ESM)  

Central Processing Unit (CPU)  

Dual in-line Memory Module (DIMM)  

Database Accelerator Card (DAC)  

Network Interface Controller (NIC)  

In an N200x / N3001 system, an SPU runs at 100% performance when it handles no more than 40 dataslices. Because each system has an "extra" SPU, each SPU handles fewer than 40 dataslices. 

In an N200x/N3001-002 system, 40 dataslices are available and only two SPUs. Therefore, each SPU handles only 20 dataslices. When an SPU fails, the other SPU must manage 40 dataslices and the difference is more significant. 

