+1 This a good discussion Alex and I’m pleased you raised it, as it is of interest to me too.
While you say forget performance, (as you know) it is always a requirement to consider the application alongside utilization and reliability? After all, of the three, its usually only possible to pick 2 😉
Turning it on its head, we may avoid failure, but end up with a system that is unreliable from a usability perspective.
In turn, if we are forgetting performance all together, would we consider technologies such as RAIDZ? Removing the controller itself might not be the worst idea?
NB: Since the cow is a rather flame prone, I’ll temper this statement by saying that IMO Z is not particularly practical for post storage in 2013.
Like you I’ve read the papers (and then some) and my view has become one of avoiding raid5 for larger units (shoot me – I’m not selling anything).
Ahem.. so, without really contributing anything at all, I’ll simply say that I am also looking forward to some real input and figures from the big players. Will they share… I hope so 🙂
Alex
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