[dm-devel] How to properly benchmark dm-cache
snitzer at redhat.com
Fri Sep 1 15:58:30 UTC 2017
On Thu, Aug 31 2017 at 5:29pm -0400,
Remington Brasga <Remington.Brasga at taec.toshiba.com> wrote:
> Hi, I'm trying to benchmark dm-cache, but I'm having trouble getting the
> benchmark to show positive results. I've tried TPC-B, TPC-C, TPC-H, SQL,
> and a handful of other, but I think because they are simulations they
> don't generate the `hot spots' required to promote blocks to the cache.
> I know it's easy to show results using FIO with a specific configuration,
> but I was hoping to use a real benchmark like the ones I've tried.
> Does anyone have a good set of benchmarks that shows positive results?
Which kernel are you testing?
I know Sanjay Rao (cc'd) has done various dm-cache testing with an OLTP
workload against an Oracle DB and that he has seen very solid results
with the latest dm-cache.
I'm not sure if he, or others, tried any of the TPC variants but
hopefully Sanjay can respond with where/how he got dm-cache to respond
well to his tests.
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