> zero_buffers and buffer_compres_percentage=100 are essentially the same > thing, for both cases it writes buffers just fill of zeroes. So I'm not sure > what you were expecting here since you don't think it works as it should? > > If you have both zero_buffers and scramble set, then the result will be a > bit less compressible. The goal of scramble_buffers is to defeat basic > dedupe attempts. So even if you don't fully refill your buffers every time, > the blocks will be a bit different. > > -- > Jens Axboe > >
Hmm, I was assuming that scramble_buffers shouldn't have any effect since it's scrambling all zeros. Is scramble_buffers inserting random data even with zero_buffers set? -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
