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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 204.70

-2.5%

Jan 8 3:59 PM EST

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To: fyodor_ who wrote (72047)	2/20/2002 9:25:14 PM
From: pgerassi	of 275872

Dear Fyo: SMP systems go down far more often than you think. I have seen Tandem mainframes go down because the network glue was bad and it takes 4 hours to pull the offending backplane out and put in a new one. SMP systems are more costly to fix and have a higher likelyhood to fail. In addition, a cluster can simply shutdown the failed node and continue on at a slightly less powerful cluster. Matter of fact, that is how maintenance is done on clusters, you manually down the target, upgrade, fix or do whatever you need to and then fire it back up and place it back into the cluster. I wrote some software that determined that a node went down, automatically removed it from service and notified all appropriate persons on the proper list via email, prerecorded calls, etc. During testing, downtime was nil and the system could be built up or reduced at will (testing included simply powering off a node, removal of a board in a node, etc.). Pete

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