I am trying to do multi device round robin, I have been utilizing --filename=dev1:dev2 and it works great for Randoms but it doesn't work correctly for sequential (This is for multi path devices) Looking at the debug output and a blktrace for sequential it looks like it is sending the same offset to both devices Is there a way to issue Sequential IO where it increments the LBA for each IO? File1 LBA 0-4 File2 LBA 4-8 File1 LBA 8-12 File2 LBA 12-16 If this is not implemented would it be possible to implement this? Thank you! Kurt (Below is debug output) file 10720 get file /dev/nvme1n1, ref=1 io 10720 fill: io_u 0x55620e76b380: off=0x0,len=0x20000,ddir=1,file=/dev/nvme1n1 io 10720 prep: io_u 0x55620e76b380: off=0x0,len=0x20000,ddir=1,file=/dev/nvme1n1 io 10720 prep: io_u 0x55620e76b380: ret=0 io 10720 queue: io_u 0x55620e76b380: off=0x0,len=0x20000,ddir=1,file=/dev/nvme1n1 io 10720 calling ->commit(), depth 1 file 10720 trying file /dev/nvme3n1 10 file 10720 fd open /dev/nvme3n1 file 10720 file not found in hash /dev/nvme3n1 file 10720 get file /dev/nvme3n1, ref=0 io 10720 drop page cache /dev/nvme3n1 file 10720 goodf=1, badf=2, ff=31 file 10720 get_next_file_rr: 0x7f80f9fb06f0 file 10720 get_next_file: 0x7f80f9fb06f0 [/dev/nvme3n1] file 10720 get file /dev/nvme3n1, ref=1 io 10720 fill: io_u 0x55620e76b140: off=0x0,len=0x20000,ddir=1,file=/dev/nvme3n1 io 10720 prep: io_u 0x55620e76b140: off=0x0,len=0x20000,ddir=1,file=/dev/nvme3n1 io 10720 prep: io_u 0x55620e76b140: ret=0 io 10720 queue: io_u 0x55620e76b140: off=0x0,len=0x20000,ddir=1,file=/dev/nvme3n1 io 10720 calling ->commit(), depth 2 file 10720 trying file /dev/nvme1n1 31 file 10720 goodf=1, badf=2, ff=31 file 10720 get_next_file_rr: 0x7f80f9fb0510 file 10720 get_next_file: 0x7f80f9fb0510 [/dev/nvme1n1] file 10720 get file /dev/nvme1n1, ref=2 io 10720 fill: io_u 0x55620e76af40: off=0x20000,len=0x20000,ddir=1,file=/dev/nvme1n1 io 10720 prep: io_u 0x55620e76af40: off=0x20000,len=0x20000,ddir=1,file=/dev/nvme1n1 io 10720 prep: io_u 0x55620e76af40: ret=0 io 10720 queue: io_u 0x55620e76af40: off=0x20000,len=0x20000,ddir=1,file=/dev/nvme1n1 io 10720 calling ->commit(), depth 3 file 10720 trying file /dev/nvme3n1 31 file 10720 goodf=1, badf=2, ff=31 file 10720 get_next_file_rr: 0x7f80f9fb06f0 file 10720 get_next_file: 0x7f80f9fb06f0 [/dev/nvme3n1] file 10720 get file /dev/nvme3n1, ref=2 io 10720 fill: io_u 0x55620e76ad00: off=0x20000,len=0x20000,ddir=1,file=/dev/nvme3n1 io 10720 prep: io_u 0x55620e76ad00: off=0x20000,len=0x20000,ddir=1,file=/dev/nvme3n1 io 10720 prep: io_u 0x55620e76ad00: ret=0 io 10720 queue: io_u 0x55620e76ad00: off=0x20000,len=0x20000,ddir=1,file=/dev/nvme3n1 io 10720 calling ->commit(), depth 4 file 10720 trying file /dev/nvme1n1 31
