Using fully mirrored system disks on Linux
March 24, 2009
I'm on record as building systems that use
mirrored system disks with plain
You know what? I was wrong. Totally wrong. I've now built a system with
a fully mirrored system disk and not only does it work, it works better
than my old way. I will henceforth now mirror
With swap, you probably don't need that much swap, it works, and while init scripts seem to be much more tolerant of missing swap areas than missing filesystems I don't see any reason to take chances if I don't have to. And 'mirror everything' is a very simple rule to keep straight.
(I don't have any idea of the performance tradeoffs of mirrored swap versus non-mirrored swap, but my view these days is that if you are worried about the performance characteristics of your swap space, something horrible has gone wrong to start with.)
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