Hello,
I'm conducting some performancetests with KVM-virtualized CentOSes. One
thing I noticed is that guest I/O performance seems to be significantly
better for virtio-based block devices ("drive"s) if the cache=none
argument is used. (This was with a rather powerful storage system
backend which is hard to saturate.)
So: Why isn't cache=none be the default for drives?
--
Troels
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