On 10/09/2009 09:06 PM, Matthew Tippett wrote:
Thanks Duncan for reproducing the behavior outside myself and Phoronix.
I dug deeper into the actual syscalls being made by sqlite. The
salient part of the behaviour is small sequential writes followed by a
fdatasync (effectively a metadata-free fsync).
As Dustin indicates,
if scsi is used, you incur the cost of virtualization,
if virtio is used, your guests fsyncs incur less cost.
So back to the question to the kvm team. It appears that with the
stock KVM setup customers who need higher data integrity (through
fsync) should steer away from virtio for the moment.
Is that assessment correct?
Christoph, wasn't there a bug where the guest didn't wait for requests
in response to a barrier request?
--
error compiling committee.c: too many arguments to function
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