> scramble_buffers tells fio to randomly insert some data in the buffer. It's > not a full overwrite or anything like that, just some basic garbage for each > 512b to prevent naive compression/dedupe. > > -- > Jens Axboe > > Thanks, that makes sense. I guess my only concern is one might expect that setting zero_buffers alone would provide fully compressible data, not realizing that scramble_buffers is still adding some random data unless explicitly turned off. Maybe something that could be added to the man page / how to under zero_buffers? Something like... "If you want a fully compressible workload, also set scramble_buffers=0." -- 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
