On 2/4/16, 6:11 PM, "Alireza Haghdoost" <alireza@xxxxxxxxxx> wrote: >On Thu, Feb 4, 2016 at 4:32 PM, neto from Brazil ><Antonio.Jose.Rodrigues.Neto@xxxxxxxxxx> wrote: >> Hi All, >> >> This is neto from Brazil >> >> How are you? >> >> I have captured a blktrace from an Oracle workload. 18 dm devices. >> >> Steps to capture: >> >> blktrace <device 0> <device 1> ... -w 40 >> blkparse -i <device 0> -i <device 1> ... -o /dev/null -d >>oracle_trace.out >> >> Trying to replay with FIO (here I have 2 devices - /dev/sdh and >>/dev/sdi) >> >> Testing with one device: >> >> [workload] >> ioengine=libaio >> iodepth=1 >> size=100g >> numjobs=1 >> direct=1 >> thread >> read_iolog=/root/traces/oracle-s144/oracle_trace.out >> replay_no_stall=1 >> replay_redirect=/dev/sdh >> >> [root@oraperf1 fio]# ./fio oracle-replay.cfg >> workload: (g=0): rw=read, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, >>iodepth=1 >> fio-2.2.9-26-g669e >> Starting 1 thread >> fio: ioengines.c:422: td_io_open_file: Assertion `!fio_file_open(f)' >> failed. >> Aborted (core dumped) >> >> >> >> >> >> Questions: >> >> 1) The workload that I capture, all DM devices have 200GB size. My >>devices >> where I want to replay have 100GB. I believe I will need to match the >>size >> of all disks (where I captured the workload) with the destination where >>I >> am going to replay. For example: If I capture a workload with 18 LUNs >> 200GB, to replay I need to have 18 LUNs with 200GB minimum. > >That is right. Your best bet to create one 100GB partition on each one >of those 200GB DMs. Therefore, physically you have 200GB DM. However, >the workload only goes to the first 100GB. Then capture new trace and >try to replay your new trace. > >> >> 2) I need to replay to more than one device. How can I do that with fio? >> Seems to me replay_redirect is for a single specified device. > >replay with btreplay or blkreplay instead of fio. > >> 3) Any help why I am getting that error? fio: ioengines.c:422: >> td_io_open_file: Assertion `!fio_file_open(f)' failed. >> >> Thank you very much for all help. >> >> All the best >> >> neto >> Hi Alireza, This is neto from Brazil How are you? Actually I have to reply with FIO and I will explain why... :-) The workload that I have been generating is HIGHLY compressible and I would like to use FIO to control the % of the compressible for the workload. Unfortunately, I won't be able to do that with blkreplay. Thanks for your reply. Thanks neto -- 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
