hi! not many responses came on that question, but thanks to all that answered... special thanks to Brian Keith from Sun who forwarded my question directly to Ellard Roush, here's the answerer from Ellard, thank you Ellard ;) "" I saw your query on SunManagers; I contacted Ellard Roush here at Sun for you and here's his response to your query: Parallel data bases, such as RAC, can benefit from more interconnect bandwidth in some cases. We do not run data bases on top of pxfs. For general purpose file system work loads running on pxfs there is NO benefit to adding additional interconnects. The limiting factor is CPU processing power. The interconnect is not heavily stressed. I have not measured this recently. But this has been true for many years. Spend your money on more CPUs/memory. "" best regards - martin [[QUESTION]] i've read threw some articles about the Cluster FS Performance and how to increase it, but still i am missing one simple answerer... Does it help to increase the numbers of interconnects? i found in the blueprint from Ellard Roush, 817-1593 "Cluster File System Performance", that the client side cache has to make round trips across the interconnect, PxFS checkpoints cross the interconnect and the acknowledgements go threw... I found in an interconnect description that data is striped across all available interconnects in a round-robin fashion. So looking to the prices of gigabit copper ethernet cards nowadays, it's no matter about money to increase the number of interconnects like mr. roush mentioned in his blueprint in 2003... i found a hint in my cluster-course training book "you can have more than two that would be a performance benefit in certain circumstances ( <-- ??? ), because global data access traffic is striped across all of the transports" so well, easy question, but i couldn't find any answerers.. does it actually help to increase the throughput by adding additionally interfaces? [[QUESTION]] _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Mon Nov 5 06:41:18 2007
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