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[20060428]
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Overhead of vnd(4) as disk device in Xen
When you run a Xen domU, the question is what to use as a
harddisk to run the operating system from. Options are
a dedicated harddisk partition, or using a vnd(4) disk-image.
While disk-images are a lot more flexible the manage than
partitions, there's a drawback because access to anything
on the image goes through the dom0's filesystem, and is
thus slower.
How much slower exactly using a disk image instead of a raw
partition is
was asked on tech-perform,
and Greg Troxel gave
some interesting numbers.
Now what I wonder is
what impact the filesystem type has...
[Tags: benchmark, xen]
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