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[Discuss] linux on usb stick

On Tue, Feb 4, 2014 at 12:44 PM, Richard Pieri <richard.pieri at> wrote:
> As a note, VMware ESX does /not/ cache writes. If a guest issues a sync call
> then the hypervisor will pass it to the controller and wait until the
> controller confirms the write operation is complete. Xen does the same thing
> when using the phy disk driver. KVM/QEMU does the same for writes by
> default.

Recent? versions of VirtualBox have an option to control "host io caching".
Their documentation states that VirtualBox uses its own "small cache"
to buffer writes even
if you turn off "host io caching".   No idea what that means.

Bill Bogstad

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