Hi Mike, I'm using the latest release of RHEL 7.4, kernel version 3.10.0-693.el7.x86_64. Thanks for sharing. I am looking forward to Sanjay's comments. Thanks, -Remi -----Original Message----- From: Mike Snitzer [mailto:snitzer@xxxxxxxxxx] Sent: Friday, September 01, 2017 08:59 To: Remington Brasga Cc: dm-devel@xxxxxxxxxx; Sanjay Rao; ejt@xxxxxxxxxx Subject: Re: How to properly benchmark dm-cache On Thu, Aug 31 2017 at 5:29pm -0400, Remington Brasga <Remington.Brasga@xxxxxxxxxxxxxxxx> 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? Hi Remi, 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. Mike -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
