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] (Paul Gilmartin) writes: > What does it mean to "max out" Is it that regardless of how > much work is available to be dispatched, the utilization > never rises above 30%? If so, what other bottleneck is > constraining throughput? sort of reminds me of when in the late 80s we were running around doing 3-tier and middle ware/layer executive presentations and taking lots of arrows from the SAA forces. Lots of past posts http://www.garlic.com/~lynn/subnetwork.html#3tier part of the 3-tier and middle ware/layer executive presentations involved e-net (as opposed to 16mbit t/r). the "word" was that e-net only could get 1mbit thruput. However, it appeared that they must of been using for the comparison, the original 3mbit enet before listen-before-transmit. there was an '88 acm sigcomm article that configuration of something like 40 stations in low-level device driver loop constantly transmitting minimum sized packets ... that 10mbit e-net over cat5 would drop off to only 8mbits effective thruput. along with that, the new almaden bldg. had been wired w/cat5 supposedly for 16mbit t/r ... but tests were showing that 10mbit enet over the cat5 had both higher effective thruput as well as lower latency than 16mbit t/r over the same cat5. disclaimer: my wife had been con'ed into going to pok to be in charge of loosely-coupled architecture. while there she came out with peer-coupled shared data architecture ... misc past postings http://www.garlic.com/~lynn/subtopic.html#sharedata and also while in pok was co-inventor on token-passing ring patent (that was subsequently granted). and except for ims hot-standby ... the peer-couple shared data architecture had very little uptake until sysplex. ---------------------------------------------------------------------- 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
