Dear fio Team, I am running fio in a loop with varying values for some parameters: FIO_RESULT=$(fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --bs=$BLOCK_SIZE --iodepth=64 --readwrite=randrw --rwmixread=75 --sync=sync --numjobs=5 --group_reporting --size="$TEST_FILE_SIZE" --filename="/$ZPOOL_NAME/$TEST_FILE" --output-format=terse) For each run a zfs pool is created and afterwards discarded. Now the output I analyse in Excel looks strange at some points: * some combination of those values lead to output of a lot of zeros in relevant columns, especially Write Bandwidth (mean) and Read Bandwidth (mean) and their accompanying columns. * it seems that small test file size and large block size lead to that, but not exclusively? * on the other hand Write Bandwidth (KB/s) column gives huge values compared to other runs, how does that make sense? See picture of collapsed table attached. (https://imgur.com/a/V5FsmmU ) Would it help to provide the full table, or is there a logical explanation for this, like something regarding block size, multipliers, filesize, r/w percentage or so on? greetings Sven
