Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Wed Sep 24 13:16:23 2025 Auto Mode Machine = Linux oleg456-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg456-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 5252 13907 202622 213246 64 8 7532 28230 460591 342477 64 16 7094 42610 615952 552557 64 32 8822 55891 886494 926260 64 64 6966 67364 1083249 1599680 128 4 8360 13622 296973 220317 128 8 12110 31060 432330 482881 128 16 14942 46342 526444 578645 128 32 12277 63237 895074 771581 128 64 13653 84482 1111981 1085013 128 128 13169 70411 1231904 1705404 256 4 12529 21527 263896 332963 256 8 13475 22497 427989 462061 256 16 13802 57878 689708 638445 256 32 22717 70720 882426 738065 256 64 30662 85191 1180188 764334 256 128 28533 93737 1354356 1430119 256 256 30307 112330 1540948 1952947 512 4 12259 16738 201815 188643 512 8 19418 27034 501419 532767 512 16 23383 32701 422832 538377 512 32 29918 56713 633699 800163 512 64 33429 90619 1147892 906185 512 128 29696 83919 1323315 1163439 512 256 46728 98726 1326585 1614885 512 512 34006 114925 1619757 2016784 1024 4 11857 15771 228421 212887 1024 8 23791 31186 469302 425758 1024 16 34087 43106 656040 501232 1024 32 38971 69120 806293 776834 1024 64 46209 83695 1150600 1060013 1024 128 52178 96840 1168760 1213334 1024 256 61657 126920 1885572 1176766 1024 512 37232 127063 1482144 2120127 2048 4 14836 18160 223290 192695 2048 8 23569 23204 458476 351530 2048 16 37467 47089 688417 412485 2048 32 44219 60012 1012867 1039590 2048 64 51199 90471 1211247 972503 2048 128 58406 103131 1058942 1161617 2048 256 65902 103622 1332432 1366343 2048 512 68271 124416 1690996 1252577 4096 4 15938 18199 189778 234042 4096 8 24454 27972 387363 372869 4096 16 37246 44354 452294 585807 4096 32 47971 63151 1088173 748682 4096 64 51807 79939 1295830 573660 4096 128 65005 75485 1146103 970131 4096 256 63238 89307 1562259 945933 4096 512 73796 113645 1498749 1493797 8192 4 14341 16515