On 3/16/14, 7:53 PM, "Matthew Eaton" <m.eaton82@xxxxxxxxx> wrote: >On Mon, Mar 10, 2014 at 2:18 PM, Neto, Antonio Jose Rodrigues ><Antonio.Jose.Rodrigues.Neto@xxxxxxxxxx> wrote: >> Hi All, >> >> This is neto from Brazil >> >> How are you? >> >> I need to know how to control the % of compression and deduplication >>using >> fio? >> >> My idea is to generate some workload based on: >> >> Workload Random >> 0% compressible and 0% dedupable >> >> Workload Mixed >> 20% compressible and 20% dedupable >> >> Workload Easier >> 100% compressible and 100% dedupable >> >> Could you please help me? >> >> Thank you very much, >> >> All the best >> >> neto >> >> -- >> To unsubscribe from this list: send the line "unsubscribe fio" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > >Hi Neto, > >Have you tried using buffer_compress_percentage? Setting this to 100 >would get you 100% compressible data while 0 would be 0% compressible. > Note that if you use fio prior to version 2.1.6 in git, you will also >want to set scramble_buffers=0 to get the desired compression. > >I don't know how you would control how dedupable the data is, since to >my knowledge there is no way to specify how repeatable the data >pattern is. But I think fully incompressible data is naturally not >dedupable, while the opposite is true for fully compressible data. Hi Matthew, This is neto from Brazil How are you? Thank you very much for your reply. I will try to do some tests this week and I will share the results. Thanks again, All the best, neto -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
