The following message is a courtesy copy of an article that has been posted to bit.listserv.ibm-main,alt.folklore.computers as well.
[email protected] (Scott Rowe) writes: > Well, I've never heard of a large PowerPC server, I think you are referring > to POWER. re: http://www.garlic.com/~lynn/2008r.html#71 Curiousity: largest parallel sysplex around? http://www.garlic.com/~lynn/2008r.html#72 Curiousity: largest parallel sysplex around? as mentioned here http://www.garlic.com/~lynn/2008r.html#43 another one biting the dust? power (rios) started out multi-chip, high-end processor that didn't have any provisions for multiprocessor operation (no cache consistency operation). paperweight image with (original) six chip rios/power http://www.garlic.com/~lynn/riospw.jpg power/pc was targeted for single-chip implementation that would have (eventually) cache consistency support for smp, tightly-coupled, shared-memory, multiprocessor operation. this is item (referenced in the above) to converge the two POWER4 System Microarchitecture http://www-03.ibm.com/systems/p/hardware/whitepapers/power4.html from above: With POWER4, the convergence of iSeries and pSeries microprocessors will reach a new level. POWER4 was designed from the outset to satisfy the needs of both of these systems. ... snip ... as referenced ... one of the reasons that we were doing cluster scale-up in this period (jan92) http://www.garlic.com/~lynn/95.html#13 was because there was no cache consistency support (original power ... and multiprocessor power/pc didn't yet exist). lots of past posts mentioning ha/cmp product http://www.garlic.com/~lynn/subtopic.html#hacmp and old email mention working on ha/cmp scaleup http://www.garlic.com/~lynn/lhwemail.html#medusa and there was nothing in medusa (architecture) that would preclude having clusters (i.e. loosely-coupled) of tightly-coupled multiprocessors. -- 40+yrs virtualization experience (since Jan68), online at home since Mar70 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
