Hi,
I would like to call attention to the SQLite performance under KVM in
the current Ubuntu Alpha.
http://www.phoronix.com/scan.php?page=article&item=linux_2631_kvm&num=3
SQLite's benchmark as part of the Phoronix Test Suite is typically IO
limited and is affected by both disk and filesystem performance.
When comparing SQLite under the host against the guest OS, there is an
order of magnitude _IMPROVEMENT_ in the measured performance of the guest.
I am expecting that the host is doing synchronous IO operations but
somewhere in the stack the calls are ultimately being made asynchronous
or at the very least batched for writing.
On the surface, this represents a data integrity issue and I am
interested in the KVM communities thoughts on this behaviour. Is it
expected? Is it acceptable? Is it safe?
Regards,
Matthew
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