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: Fri Aug 14 14:37:49 2026 Auto Mode Machine = Linux oleg206-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-oleg206-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 2640 3328 520419 488236 64 8 3692 17148 792299 557144 64 16 4573 9765 818885 604849 64 32 4831 18088 809014 998622 64 64 2533 63298 1138375 1526887 128 4 4764 7876 584313 287587 128 8 1910 4860 843068 640042 128 16 4554 19740 1885042 618653 128 32 7418 21174 1281909 1057236 128 64 6919 33394 272965 1543594 128 128 5924 33065 1332828 2286447 256 4 3078 3552 599251 517265 256 8 2225 7261 868157 428159 256 16 3628 20224 477684 129697 256 32 11505 36760 980760 783292 256 64 14259 48384 1243036 1219045 256 128 11716 76147 1707589 1430119 256 256 13623 60894 463058 1237306 512 4 6422 13731 514637 808904 512 8 18662 22548 829526 632765 512 16 19945 40715 811655 670291 512 32 16521 40270 1640796 819085 512 64 36676 85076 839252 1024169 512 128 19733 74985 1047141 1635797 512 256 12483 65902 400664 546321 512 512 11045 18885 1590957 2207515 1024 4 5160 6495 235510 325085 1024 8 9034 8659 287465 616490 1024 16 19198 13038 351504 413900 1024 32 13396 30361 147250 639626 1024 64 10639 22474 953418 101037 1024 128 23120 46901 1525848 1024121 1024 256 32770 51558 939446 516668 1024 512 22771 53711 539243 509195 2048 4 5938 5075 125628 412902 2048 8 11165 8308 181318 282518 2048 16 10300 11740 1040598 913064 2048 32 24113 31108 611696 284719 2048 64 20379 30762 240716 1172238 2048 128 28161 64636 266182 499159 2048 256 25943 60824 506428 1218464 2048 512 34461 99408 1801275 504939 4096 4 6548 7013 349462 356489 4096 8 13563 14919 400073 314570 4096 16 10300 28328 217872 455013 4096 32 26342 24232 590966 565745 4096 64 26141 53443 608334 748812 4096 128 24182 56705 513601 627740 4096 256 46123 63123 446719 1219052 4096 512 39585 64353 569137 739625 8192 4 6019 7053 390505 367484 8192 8 9166 9200 460952 354788 8192 16 15252 26065 567509 541295 8192 32 16469 26075 443289 379046 8192 64 23340 44126 730703 619476 8192 128 21866 30425 526514 454128 8192 256 22091 48151 324449 584142 8192 512 38617 50883 435165 547079 16384 4 5200 5739 284010 334135 16384 8 11457 8833 273458 271834 16384 16 11047 16841 525415 482889 16384 32 17368 19552 580289 538592 16384 64 20957 25467 519913 641807 16384 128 20444 29510 668953 763899 16384 256 27781 34693 692738 525736 16384 512 30202 34225 374063 512289 32768 4 4041 5386 308593 165614 32768 8 12608 10175 550185 439921 32768 16 11188 16587 687983 298879 32768 32