On Mon, Sep 19, 2016 at 4:43 AM, Ivan Kolodyazhny <[email protected]> wrote:
> Hi team, > > We did some performance tests [1] for LVM and BDD drivers. All tests were > executed on real hardware with OpenStack Mitaka release. Unfortunately, we > didn't have enough time to execute all tests and compare results. We used > Sahara/Hadoop cluster with TestDFSIO and others tests. > > All tests were executed on the same hardware and OpenStack release. Only > difference were in cinder.conf to enable needed backend and/or target > driver. > > Tests were executed on following configurations: > > - LVM +TGT target > - LVM+LocalTarget: PoC based on [2] spec > - LVM+LIO > - Block Device Driver. > > > Feel free to ask question if any about our testing infrastructure, > environment, etc. > > > [1] https://docs.google.com/spreadsheets/d/1qS_ > ClylqdbtbrVSvwbbDpdWNf2lZPR_ndtW6n54GJX0/edit?usp=sharing > [2] https://review.openstack.org/#/c/247880/ > > Regards, > Ivan Kolodyazhny, > http://blog.e0ne.info/ > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: [email protected]?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > Thanks Ivan, so I'd like to propose we (the Cinder team) discuss a few things (again): 1. Deprecate the BDD driver Based on the data here LVM+LIO the delta in performance (with the exception of the Terravalidate run against 3TB) doesn't seem significant enough to warrant maintaining an additional driver that has only a subset of features implemented. It would be good to understand why that particular test has such a significant peformance gap. 2. Consider getting buy off to move the default implementation to use the LIO driver and consider deprecating the TGT driver I realize this probably isn't a sufficient enough data set to make those two decisions but I think it's at least enough to have a more informed discussion this time. Thanks, John
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