It’s almost a year since I blogged about qdda (the Quick & Dirty Dedupe Analyzer). qdda is a tool that lets you scan any Linux disk or file (or multiple disks) and predicts potential thin, dedupe and compression savings if…
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Baking a cake: trading CPU for IO?
Sometimes I hear people claim that by using faster storage, you can save on database licenses. True or false? The idea is that many database servers are suffering from IO wait – which actually means that the processors are waiting…
1,082 total views
Oracle ASM vs ZFS on XtremIO
Background In my previous post on ZFS I showed how ZFS causes fragmentation for Oracle database files. At the end I promised (sort of) to also come back on topic around how this affects database performance. In the meantime I…
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Getting the Best Oracle performance on XtremIO
(Blog repost from Virtual Storage Zone – Thanks to @cincystorage) UPDATE: I’ll say it again because there seems to be some confusion: THIS IS A REPOST! Original content is from the Virtual Storage Zone blog (not mine). Just reposted here…
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The public transport company needs new buses
A public transport company in a city called Galactic City, needs to replace its aging city buses with new ones. It asks three bus vendors what they have to offer and if they can do a live test to see…
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