It doesn't make sense to set refill_buffers and scramble_buffers at the same time, since you won't get any repeating data with refill_buffers set. On Mon, May 4, 2015 at 7:23 PM, Srinivasa Chamarthy <chamarthy.raju@xxxxxxxxx> wrote: > Thanks Jens. I was using refill_buffers and scramble_buffers at the > same time. If i specify them at the same time, there seems to be no > difference in the workloads. If i specify scramble_buffers then there > shouldn't be refill_buffers specified to get the buffers differently. > Thanks. > Srinivasa R Chamarthy > > > On Tue, May 5, 2015 at 4:39 AM, Jens Axboe <axboe@xxxxxxxxx> wrote: >> On 04/25/2015 07:03 AM, Srinivasa Chamarthy wrote: >>> >>> Firstly, thanks before in hand. :) >>> >>> Using FIO, what is the way to achieve a work load with specific number >>> of unique blocks duplicates for specific number of times. For Example, >>> i want a 252k block duplicates 1000 times and i want it to be the >>> unique block in the complete workload. >> >> >> If you have very specific requirements, it might be easier to simply write >> an iolog generator that spits out what you want the pattern to look like. >> Then fio can import that, and run the workload. >> >>> Another query is that, for a blocksize of 256k does the io buffers are >>> created at 256k and written to the disk and are all those 256k blocks >>> unique buffer?. Can there be a change that in a 256k block, the >>> smaller size buffers be the same? >> >> >> That depends on the settings for compressibility, dedupability, etc. In >> general see scramble_buffers, refill_buffers, and so on. That is all in the >> man page or HOWTO. >> >> -- >> Jens Axboe >> > -- > 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 -- 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
