On Tue, Aug 28, 2012 at 4:04 AM, Stan Hoeppner <s...@hardwarefreak.com> wrote:
> It's memory bandwidth of 20GB/s was many times higher than any x86 > server at that time as they all used a single P6 bus, with only 1GB/s > bandwidth. 20GB/s is peanuts today given just two channels of DDR3-1333 > have just over 20GB/s, but back then, in the late 1990s, this was huge. > This CMP design also allowed assigning different amounts of memory to > each of the hosts, with the firmware and custom crossbar chipset setting > up the fences in the physical memory map. Individual PCI buses and IO > devices could be assigned to any of the partitioned servers. In the > first models, a console module had to be installed which included VGA, > KB, mouse ports and each was controlled via a KVM switch. Later models > had a much more intelligent solution in the form of a single system > controller. > > This also facilitated the ability to cluster multiple sets of two > physical hosts (up to 4 clusters per server) within a single server > using system memory as the cluster interconnect, with latency thousands > of times lower and bandwidth thousands of times higher than the fastest > network interconnects at that time, this became immensely popular with > Unisys customers, many running multiple clustered MS SQL servers within > one ES7000 mainframe. > wasn't the 20GB/s infiniband introduced in the late 90s / early 2k? that should about measure up to what you're describing, but with tons more scalability, no? -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CAH_OBidTGH=Dof=4v7eXRrdfy2oOLUA=5BexHupCS4_=qto...@mail.gmail.com
