On Freitag, 10. September 2010 Richard Scobie wrote: > Limited testing using dd and bonnie++ shows no difference in write > performance For dd it should always show the same, as you just sequentially write a large file. Only with bonnie you would see differences due to stripe sets, as the speed only drops when doing I/O not on boundaries and/or smaller than the stripe size, as the stripe size is the smallest possible I/O for the RAID. I don't know why you don't see any difference with bonnie though. FWIW, a stripe set of 256k means you do read/write 256k from a single drive on each I/O, then the next 256k from the next drive. I hope you have very few small accesses and mostly very large files. If you'd use a database on that system it would crawl... -- mit freundlichen Grüssen, Michael Monnerie, Ing. BSc it-management Internet Services http://proteger.at [gesprochen: Prot-e-schee] Tel: 0660 / 415 65 31 ****** Aktuelles Radiointerview! ****** http://www.it-podcast.at/aktuelle-sendung.html // Wir haben im Moment zwei Häuser zu verkaufen: // http://zmi.at/langegg/ // http://zmi.at/haus2009/
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