NPartition
computer partitioning technology
An nPartition is a hard partition technology in Hewlett Packard Enterprise's (formerly Hewlett-Packard) Virtual Server Environment. nPartitions (or nPar) are electrically isolated from other nPar partitions within the same chassis. Cells (a unit of processors/IO/memory) make up nPar partitions. Being electrically isolated means that if a nPar partition were to fail due to hardware failure, then the other nPar partitions would continue to work. This is contrasted with vPar partitions which exist within nPar partitions in which a failure at the hardware level for a nPar would affect all vPars within that nPar.
The principle of nPartitioning
in HP Cell based systems is to combine several cells to increase the computing power of a system by adding more memory/processors/IO.
This in contrast to vPartitioning where you slice bigger hardware (nPars) into smaller systems to which you dedicate hardware.
This is valid for all mid-range (rp74/rx7600, rp84/rx8600) and all Superdome servers.
Advantages
When buying a mid-range server from HP with only one cell, the customer might realize over time that his database system requires more computing power, thus by buying an addon cell he can add this cell to his existing nPar (with only one cell) to create a new nPar consisting of two cells, which in a maximum configuration would mean double the number of CPUs and memory.
This can be done on any cell based system, this includes the mid-range family and the Superdome.
If the cells are added as floating cells (no interleaved memory) they can also be warm added and removed from the partition.
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