Editing Pyramid Technology (section)

===Nile series===
The release of the 150&nbsp;MHz 64-bit [[R4000|R4400]] led to the 2–16-CPU Nile series in late 1993. With each CPU capable of 92&nbsp;MIPS, the Nile systems were true supercomputers. Their last product, the Reliant RM&nbsp;1000, known internally as the Meshine, was just coming to market when Siemens bought them. The RM1000 was a [[massive parallel processing]] (MPP) computer. Each node ran its own instance of [[Reliant UNIX]] DC/OSx. This system had a two-axis mesh architecture. The RM1000 used software called ICF to manage the cluster interconnects. ICF went on to provide the cluster foundation in the PrimeCluster HA software which is still developed and available from Fujitsu Siemens.

Each compute node in the mesh used a single MIPS [[R10000]] CPU, however enhancements to the RM1000 allowed for the NILE SMP machines to be included into the mesh as "fat" nodes. The compute nodes were physically installed in the HAAS-3 frames that shipped as drive arrays with the earlier Nile product. Each compute node controlled six [[SCSI]] disks as the primary controller and another six disks as a secondary controller. The frame with up to six compute nodes or four compute nodes and two Nile attach gateways was connected to neighboring frames with short [[ribbon cable]]s. A HAAS-3 frame with compute nodes installed was called a cell. The cells locked together and could be stacked two high and end to end as far as space permitted. Four cells together were known as a ton and systems were referred to by the number of tons they contained. The largest mesh constructed at Pyramid was a test system containing 214 CPUs including four Nile SMP nodes.

Although the RM1000 was eventually discontinued and not replaced by Siemens, customers who had large installations such as a large UK [[telecommunications]] company took a long time to find suitable replacements for these massively parallel systems due to their massive I/O and computing capabilities.