On 12/05/2014 12:25 AM, Karthick Srinivasachary wrote:
Hi Jens, Awesome.. Thanks for the fix..! With compress_percentage 80 or more, fio verify is failing. I don't think there any issue with storage in my test environment. Do you think we have a bug here. Complete command and output below. /usr/local/bin/fio --name=global --ioengine=libaio --bsrange=16k-64k --rw=randrw --iodepth=16 --direct=1 --verify=md5 --name=job0 --size=100m --filename=/fio/fio.dat --rw=randrw --rate=20m --buffer_compress_percentage=80 --refill_buffers --buffer_pattern=123 --verify_dump=1
You can't do a random read/write test, it'll fail on the reads that have not been populated. It might sometimes work if the file had been laid out prior with the right contents, but generally you cannot depend upon it. You want to do just --rw=randwrite and then the verify phase will take place after the writes are done, verifying those.
Try and delete fio.dat prior to running this job, and it should fail consistently with or without buffer_compress_percentage.
-- 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
