Author: Robert Hyatt
Date: 08:02:18 09/02/03
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On September 02, 2003 at 00:14:02, Jeremiah Penery wrote: >On September 01, 2003 at 23:23:18, Robert Hyatt wrote: > >>On September 01, 2003 at 09:39:55, Jeremiah Penery wrote: >> >>>Any large (multi-node) SMP machine will have the same problem as NUMA with >>>respect to inter-node latency. SMP doesn't magically make node-to-node >>>communication any faster. >> >>Actually it does. SMP means symmetric. >> >>NUMA is _not_ symmetric. > >Of course. The acronym means "non uniform memory access". > >But if you think "symmetric" necessarily means "faster", maybe you'd better look >in a dictionary. I _know_ it means faster for _every_ machine I have ever used. Should I enumerate them for reference? NUMA potentially scales better, price-wise, to large numbers of processors. It _is_ a significant compromise in performance, however... NUMA is _not_ new. Go back 20 years to the first connection machine.
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