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Why clone databases for firefighting

Ah, memories of a distant time where i worked for leading companies that applied these practices already 10 years ago.

Dirty Cache

clones As more and more customers are moving their mission-critical Oracle database workloads to virtualized infrastructure, I often get asked how to deal with Oracle’s requirement to reproduce issues on a physical environment (especially if they use VMware as virtualization platform – as mentioned in Oracle Support Note # 249212.1).

In some cases, database engineers are still reluctant to move to VMware for that specific reason. But the discussion is not new – I remember a few years ago I was speaking in Vienna to a group of customers and partners from Eastern Europe, and these were the days we still had VMware ESX 3.5 as state-of-the-art virtualization platform. Performance was a bit limited (4 virtual CPUs max, some I/O overhead and memory limitations) but for smaller workloads it was stable enough for mission critical databases. So I discussed the “reproduce on physical in case of problems” issue and I stated…

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